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Copyright © 2002 Computer Knowledge
Raw
cknow.txt
Copyright © 2002 Computer Knowledge
All Rights Reserved
This download for personal use only. Do NOT distribute
it to others either alone or incorporated into any
software without prior permission from Computer Knowledge.
Developers who wish to incorporate portions of the list
please see the comments at the end of this file.
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.A UNIX Library [UNIX]
ADA Program
.A01 ARJ Multi-volume Compressed Archive (can be 01 to 99) (also see .000)
.A01 - .A10 OzWin CompuServe E-mail/Forum Access SYSOP File
.A06 Lotto Pro 2002 Smart Number Ticket
.A11 AIIM Graphic
.A31 Authorware 3.x Library
.A3D Amapi 3D Modeling
.A3K Yamaha A3000 Sampler File
.A3L Authorware 3.x Library
.A3M Unpackaged Authorware MacIntosh File
.A3W Unpackaged Authorware Windows File
.A41 Authorware 4.x Library
.A4L Authorware 4.x Library
.A4M Unpackaged Authorware MacIntosh File
.A4P Authorware File Without Runtime
.A4W Unpackaged Authorware Windows File
.A51 Authorware 5.x Library
.A5L Authorware 5.x Library
.A5W Unpackaged Authorware Windows File
.A64 Artist 64 [XnView]
.A65 Macromedia Authorware v6.5 (unverified)
.A8 Cubicomp PictureMaker 24bit 3D Animation (DOS-based animation program; graphics cards external to computer; Cubicomp closed 1990)
.A86 A86 Assembler Program File
.AA Audio Book File
PROGNOSIS Automated Analyst Document File
.AAA Xtal Backup (System of Crystallographic Programs)
Softphrase Automation File
App Cam Automation File
Sybase SQLAnywhere Temp File
.AAB Macromedia Authorware Binary
.AAC Advanced Audio Coding File
.AAM Authorware Shocked File
.AAO America's Army Map
.AAP Apollo Advanced Playlist
.AAS Authorware Shocked Packet
.AAT Arcinfo Line Data Attribute Data (GIS-related file)
.AB Applix Builder File
.AB2 Parson's Address Book
.AB3 PhotoImpact Album File
.AB4 ENIAC Computing AB4 Accounting & Business File
.AB6 AB Stat Data
.AB8 AB Stat Data
.AB$ AutoCAD Spooled Plot File
.ABA Palm Address Book File
.ABC Flowchart
Musical Notation Language File (folk melodies originally)
Pro-Act (Activity Based Costing)
.ABD AmBiz Bonus Calculator Data File
Adventure Builder Database
.ABF Adobe Binary Screen Font
.ABK Corel Draw AutoBackup
Any Automatic Backup
.ABL Maxagrid Avails Data File (text format)
.ABM HitPlayer Audio Album File
Photo Impressions 2000 Album
Album File (various)
.ABO Applix Builder Turbo File
.ABR Photoshop Brush
.ABS Abstracts
MPEG Audio Sound File [MPEG]
PC GNU Compiler Output
Abscissa Data File
Optocat [XnView]
.ABT The Arbiter Sports Official Schedule [Viewer]
.ABW AbiWord Document File
.ABX WordPerfect Address Book File
.ABZ AbszOrb (textured spinning orb creator)
.AC CaseWare Working Papers Client File
.AC_ CaseWare Working Papers Compressed Client File
.AC$ AutoCAD Undo Info
.AC3 AC3 Audio File Format [DVD Maestro, DVD Conductor]
.ACA MS Agent Character File
Project Manager Workbench File
.ACB ACBM Graphic Image
AOL Cab Launcher (archived data file)
.ACC DR-DOS Viewmax File
.ACD Chromeleon Channel Raw Data
Sonic Foundry Acid Music File
allCLEAR Flowcharting File
MS Agent Character Definiton File
.ACE The Ace Archiver Compressed File
Aces200 [XnView]
.ACF MS Agent Character File
Photoshop Custom Filter
.ACG MS Agent Preview File
.ACH Rockwell Software Logix 5 File
Speccy Snapshot
.ACI ACI Development Appraisal
.ACL Corel Draw 6 Keyboard Accelerator
MS Office AutoCorrect List
ACL For Windows (data mining software)
RaidenFTPD Rights File
Access Control List
.ACM Audio Compression Manager Driver (Windows)
Photoshop Command Button
Windows System File
ACBM Image File
Interplay Compressed Sound File
.ACO Photoshop Color Swatch File
.ACP MS Office Assistant Preview File [Buy Office XP at Shop.Microsoft]
File Used by Adobe Acrobat Paper Capture
.ACQ AcqURL File (bookmark manager)
.ACR American College of Radiology File
Dicom [XnView]
.ACS MS Agent Character File
.ACT MS Office Actor Program File [Buy Office XP at Shop.Microsoft]
FoxPro Documenting Wizard Action Diagram
Photoshop Color Table
Action! Presentation
DataWave Physiological Data File
.ACU AppleLink-PE Compression Format (created by Floyd Zink; overtaken by Andy Nicholas' ShrinkIt; ShrinkIt should unpack)
COBOL Intermediate Object File
.ACV OS/2 Audio Drivers
Photoshop Saved Curve Also see
.ACW MS Accessibility Wizard Settings
.ACX FOCUS/WebFOCUS File Description
.AD AfterDark Screen Saver
Ascend Password Protocol File
.AD! OzWin CompuServe E-mail/Forum Access QS-Special - Get Marked Online
.AD2 2-bit Compressed Voice File
.AD3 3-bit Compressed Voice File
.ADA ADA Program File
ActiveDocs Answer Set
.ADB ADA Package Body
HP Organizer Appointment Database
.ADC Chromeleon Demo Data File
ActiveDocs Clipping Catalog
Scanstudio 16-color Bitmap Graphic File
Lingvo Dictionary Text File
.ADD OS/2 Adapter Device Driver
Adobe Pagemaker File
Advantage Database Server Data Dictionary
.ADE MS Access Project Extension [Buy Office XP at Shop.Microsoft]
ADC Audio File
.ADF Adapter Description File
Admin Config File
Amiga Disk File (Uncompressed 901120 byte DD Diskimage) [Amiga Forever]
Dog Creek QC Mask File
ReliaSoft ALTA 1 (Quantitative Accelerated Life Testing Analysis Software)
Actual Drawing File
MicroSim PCBoard Photoplot Aperture Definition File
ArcView ARC/INFO Coverage Data File
.ADI AutoCAD Plotter File
Advantage Data Server Database Index File
.ADJ LISCAD Plus Adjustment File
.ADL QEMM MCA Adapter Description Library [MCA]
OzWin CompuServe E-mail/Forum Access QS-Special Get Marked
.ADM After Dark Screen Saver Module
Windows Policy Template
Addict Compiled Dictionary
Advantage Data Server Database Memo File
.ADN 1-2-3 Add-in Utility
MS Access Blank Project Template [Buy Office XP at Shop.Microsoft]
.ADO Photoshop Duotone Options
Stata Program
.ADP FaxWorks Modem Setup File
Astound Dynamite File
MS Access Project [Buy Office XP at Shop.Microsoft]
AOLserver Dynamic Page File [AOL]
.ADR After Dark Random Screen Saver Module
Address Plus Database
Smart Address Address Book
Address Book
Opera Web Browser Bookmark File
.ADS ADA Package Specification
.ADT HP NewWave Card Application Data File
Advantage Data Server Database File
Lingvo Dictionary File
AdTech Fax File
.ADV GUS Virtual Device Driver
.ADX Lotus Approach Index File
Archetype Designer Document
Dynazip Active Delivery Script
Sega Dreamcast Audio File [Source of files]
.ADZ GZ-Packed Amiga Disk File (see ADF) [Amiga Forever]
.AE SoftQuad Author/Editor File
.AEF ELECTRICAL Designer
.AEH iPer Advanced Embedded Hypertext
.AEP ArcExplorer Project File
.AER Adobe Atmosphere File [As of Mar 2002 in beta]
.AEU MS AutoRoute Express Europe Route
.AEX PGP Armored Extracted Public Encryption Key [PGP]
.AF2 ABC Flowchart (Now Micrografx FlowCharter)
.AF3 ABC Flowchart (Now Micrografx FlowCharter)
.AFC Apple Sound File
ArisFlow Commander File
.AFD ArisFlow Diagram
Prismo Graphics ActiveFile Data
.AFF AnyForm Form
.AFI Truevision Bitmap Graphic
.AFL Lotus Font
.AFM Outline Font Metric
HP NewWave Cardfile Application
LOUT File (High-Level Language For Document Formatting)
.AFP Flowchart Symbol Palette
Papyrus Document Storage Format
Prismo Graphics ActiveFile Proxy
IBM Transactional Data Format (Advanced Function Print) (AS400 computer)
Gangsters Game File (unverified)
.AFS Filter Factory Photoshop Filter [Added]
Sega Dreamcast Compressed Audio
.AFT Flowchart Template
AnyForm Template
.AFW Flowchart Work Area
.AFX Auto FX Photographic Edges (Photoshop add-in)
.AG Applix Graphic
Argus Spreadsheet File
.AG4 Access G4 File [Buy Office XP at Shop.Microsoft]
.AGF Atlas GeoFile
.AGP Aspen Graphics Pages
.AGW Aspen Graphics Windows
.AHF ASP Header File
.AHQ AudioHQ Plugin Module
.AHS Photoshop Halftone Screens
.AI Adobe Illustrator Vector Graphic [XnView]
Corel Trace Drawing
Progress Database After Image File
Advantage Database Server File
EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.AIF Knowledgeware Setup Information
Audio Interchange File
SymbianOS Application Information File (set application properties)
.AIFC Audio Interchange File
.AIFF Audio Interchange File
.AIH ArcView Optional Index File (GIS-related file)
.AIJ Oracle After-Image Journal
.AIL AutoImager File (batch image conversion)
.AIM AOL Instant Messenger File [AOL]
.AIML Artificial Intelligence Markup Language
.AIN AIN Compressed Archive
ArcView Optional Index File (GIS-related file)
.AINSO VAX CRYSTALS Chemical Crystallogaphy File
.AIO APL File Transfer Format
.AIP Audiosoft Parameter File
.AIQ AzureIQ Client File (IT Audit Reporting)
.AIR Align It! Resource File
Flight Simulator Aircraft Performance Info File [Free Flight Dynamic Editor]
.AIS Array of Intensity Samples (Graphic)
Velvet Studio Instruments
ACDSee Image Sequence File
.AIX HP NewWave Cardfile Application Data
.AKF Acrobat Key File
.AKW RoboHELP Help Project Index File
.AL Oracle File (used for networking)
.ALA Alan Adventure Language File
Sharp Fax File (unverified)
.ALB JASC Image Commander Album
Steinberg Cubase or VST Backup Song File
Photo Soap2 File
.ALBM webAlbum Photo Album
HP Photosmart Photo Printing Album
.ALC Norton Internet Security Ad Server File
MP3 Embedded Dynamic Lyrics
.ALE Avid Log Exchange
.ALF Abacus Law File
ALF Logic File ("Another logical framework"--structure editor for Martin-Löf's monomorphic type theory)
AdventNet Look and Feel Standards (ALFSTANDARDS.ALF)
Aventail Connect License File (AVENTAIL.ALF)
VPCom Remote User Configuration File
LANDesk Client Manager Configuration File
ACT! User Logon Tracking
Color Quick Label
Cadence Ambit BuildGates
.ALI SAP Proprietary Format Document File
OM2 OMALI Native OMALI Document
.ALIAS Alias Image [XnView]
.ALL Arts & Letters Symbols and Characters
WordPerfect Printer Info
Steinberg Cubase or VST Song File
Always Working Page Format File
.ALS Alias Image [XnView]
Calmira Shortcut File
.ALT WordPerfect Menu File
ReliaSoft ALTA 6 (Accelerated Life Testing Analysis Software)
.ALV Photoshop Levels
Aladdin Knowledge Systems Vbox Available Languages File (software distribution)
.ALX OM2 OMALI Plug-in Extension
.ALZ ALZip Compressed File (Korean site)
Game File (Dark Eden and others)
.AM Applix SHELF Macro
Advantage Database Server File
Music File
.AM2 AutoPlay Menu Studio Version 2
.AM3 AutoPlay Menu Studio Version 3
.AMB Radiance Ambient File Format
.AMC Ant Movie Catalog
.AMF Advanced Module Format Music File
DSMIA/Asylum Module Music
.AMG AMGC Compressed Archive (alternate site)
AMG ACTOR System Image
.AMI Cocreate SolidDesigner Annotation File
Amiga Paint [XnView]
.AML AutoMage (Automation/Macro Software)
.AMM AMM File (pattern design pgm for Universal flat knitting machines)
.AMP Photoshop Arbitrary Map Settings
.AMR Adaptive Multi-Rate Codec (Phone sounds) [Player]
.AMS Extreme's Tracker Module Format
Photoshop Monitor Setup
Velvet Studio Module
.AMZ The Amazon Trail Saved Game
.AN Groundworks Text File
.AN8 Anim8or 3D Animation
.ANC Canon Computer Pattern Maker File
.ANF AcuteNotes File (contains one or several notes order in a hierarchy)
.ANI Animated Cursor Microangelo
.ANL Project Analyzer Saved Analysis
.ANM DeluxPaint Animation
.ANN Help Annotation
.ANO Annotation File (often used with annotating PDF files)
.ANS ANSI Graphic [ANSI]
MS Word Text and Layout [Buy Office XP at Shop.Microsoft]
.ANSR AnswerTool File
.ANT SimAnt for Windows Saved Game File
.ANV AirNav [XnView]
.AOB DVD Audio File (MPEG-2 program streams with additional info)
.AOF Acorn Object Format (used for data storage)
.AOS Nokia Add-on Software
.AOT ZenWorks Application Binary Object Template File
.AP Applix Presents File
Datalex EntryPoint 90 Data File
WHAP-Compressed Amiga Archive
.APA AlfaPad Organizer File
ArcPad 6 Applet
.APC Lotus Printer Driver Characters
Centura Team Developer Compiled Application File
.APD Lotus Printer Driver
Centura Team Developer Dynamic Application Library File
.APE Music Format [Many different players]
.APF Lotus Printer Driver Fonts
ArcPad 5 Profile
Acrobat Profile File
Homesite Project File
Fax2000 File
MightyFax File (send and receive faxes)
.API Lotus Printer Driver Info
Photoshop Ink Colors Setup
Application Program Interface
Acrobat Plug-in
1st Reader Passed Parameter File
.APIN Adobe InDesign Import/Export Filter
.APJ Angel Debug Monitor Project File (link is PDF file)
Music Screen Saver File (usually associated with .SCR file)
ARM Project Manager File
.APK GameSpy Arcade Service
.APL Centura Team Developer Application Library File
ArcPad 6 Layer
APL Workspace File
.APM ArcPad 6 File
.APO Apollo Scripts
.APP R:Base, Symphony, DR-DOS, FoxPro (or other) Application
Centura Team Developer Normal Mode Application File
dBASE Application Object File
ArcPad 5 Project
SymbianOS Application
CLARION for Windows Application
Executable Application (under DR-DOS, NeXTstep, Atari)
.APR Lotus Approach 97 File
ArcView Project File (GIS-related file)
Employee Appraiser Performance Review File
MicroSim PCBoard Aperture Information Report
.APS MS Visual C++ File
ArcPad 5 Symbology File
Advanced Patching Systems with Error Checking
.APT Centura Team Developer Text Mode Application File
Lotus Approach Data View File
Nimbus 7 SAMS Data File (a-priori temperature profiles)
.APX Lotus Approach Paradox-specific Information File
Borland C++ Appexpert Database
ArcPad 6 XML File
Ability Photopaint Image [XnView]
.AQ Applix Data
.AQ1 AptiQuiz Test
.AQA AptiQuiz Result
.AR Compressed Archive File (used by MS Midtown Madness 1 & 2 games)
Midtown Madness City Add-on
.ARA ATI Radeon Video Driver File
.ARC Archive File
.ARCHIMEDES Speccy Snapshot
.ARF Automatic Response File
.ARH ArHymo Hydrologic Simulation ()
.ARI Aristotle Audio File
Compressed Archive
.ARJ Compressed Archive (Stuffit can expand)
.ARK Compressed Archive
.ARL AOL Organizer File [AOL]
.ARM Armadillo Software Protection System
.ARN Astronomical Research Network [XnView]
.ARPX8 Techno Toys Arp-X8 MIDI Arpeggiator File
.ARQ Compressed Archive (often on a Macintosh)
.ARR Atari Cubase Arrangement
.ARS Artifax Report Editor (SQL query tool)
.ART Clip Art File
Xara Studio Drawing
Blood Archive [Dragon UnPACKer]
Duke Nukem 3D Archive [Dragon UnPACKer]
Canon Crayola Art File
Another Ray Tracer Format
AOL Johnson-Grace Compressed File [AOL]
First Publisher Raster Graphic
PFS: Art Publisher [XnView]
Art Director Image [XnView]
Artisan [XnView]
Bernina Artista (sewing design)
.ARV Arsiv File
AutoRoute User Information
.ARX Compressed Archive
.ARY Compaq SmartStart Scripting Toolkit File
.AS Applix Spreadsheet
Macromedia Flash Action Script (include files when writing large scripts)
.AS3 Alternate Sources Data File [Warning: Link goes to a sexually-oriented site.]
APL*PLUS II/386 and III/Windows Source Code
.AS4 AS/400 Client Access
.ASA MS Visual InterDev File
Active Server Document
.ASC ASCII Text File [ASCII]
PGP Armored Encrypted File [PGP]
.ASCX Web User Control (part of MS .NET)
.ASD MS Word Automatic Backup [Buy Office XP at Shop.Microsoft]
Lotus Screen Driver
MS Advanced Streaming Format Description File
Astound Presentation
.ASE Velvet Studio Sample
.ASF MS Active Streaming (Media) File (contains audio and/or video compressed with 3rd party codecs)
Statgraphics Data
Lotus Screen Font
APL*Plus/PC APL Shared File
Electronic Arts Music File
.ASH TASM Assembler Header
.ASI Borland Assembler Include
.ASK askSam Database
.ASM Assembler Source Language (various)
Pro/Engineer Assembly File
.ASMX ASP.NET Webservices Source File
.ASO Assembler Object
Astound Dynamite Objects
.ASP Active Server Page
Procomm Plus ASPECT Program
Astound Presentation File
Photoshop Photo File Index
Photoshop Separation Setup
EROSION 3D Aspect File [Format (pdf)]
.ASPI Audio Catalyst
.ASPX ASP.NET Source File
.ASR Ms Automap Route
Photoshop Scratch Area
.ASS Assembler/Disassembler 68HC11 File
ASS I/O (programmers utility to pack multiple files into one file)
.AST Astound Multimedia File
Photoshop Separation Tables
Claris Works Assistant File
.ASV DataCAD Autosave File
Photoshop Selective Color
.ASX Metafile (points to an .ASF structured file)
Apparently you can also put the MS Active Streaming (Media) into an .ASX file and play it with later versions.
Cheyenne Backup Script
Video File
.AT2 Aldus Persuasion 2.0 Auto Template
DCX-AT200 Motion Control Command Language File
.AT3 DCX-AT3000 Motion Control Command Language File
.ATF Photoshop Transfer Function
.ATK Bitmap Image (Andrew Toolkit Raster Object file) [XnView]
.ATL Hal/Supernova/Lunar/LunarPlus Screen Readers/Magnifiers
PROGNOSIS Atlas Document File
.ATM Adobe Type Manager Data File
.ATN Adobe Photoshop Action File
.ATO Just Burn File (audio CD burner on Compaq computers)
.ATR Lightscape Material Library
MicroSim PCBoard Attributes Report
.ATS Attityd Swedish Survey Program
.ATT AT&T Group 4 Bitmap (fax) [XnView]
.ATW AnyTime Deluxe PIM File [PIM]
Attityd Swedish Survey Program
.ATX A ZIP-formatted Compressed Archive (Use any ZIP program to open)
.AU Music File (various, usually Sun or UNIX) [Linux Player]
.AUD Audio File used by Westwood Studios for various games
.AUP ePocrates File
.AUT AutoIt Script (automate any windows based task)
PocketWear Car Lease Kit Vehicle Data File (Pocket PC)
TLG Workplace CD Search File
Xitami Webserver Admin Password File (default.aut)
GPSMan-autoMapic File (moving-map real-time plotting)
Signwave Auto-Illustrator File
Descent Manager Mission File
Authentication File (various)
Interactive Pictures iPIX Format
.AUX TeX/LaTeX Auxilliary Reference File
ChiWriter Auxilliary Dictionary File
.AV Final Draft AV Document File
.AVA Avagio Publication
.AVB Inoculan Anti-Virus Virus Infected File
Avid Bins File
Microsoft Chat Character File
.AVC Kaspersky Antivirus Toolkit File
.AVD Avery Label Pro Data File
.AVE ArcView Avenue Script
.AVI Audio Video Interleave File
.AVL ArcView Theme Legend File (GIS-related file)
.AVP ArcView Pallet File (GIS-related file)
Avid Project File
.AVR Audio Visual Research Sound File
.AVS Animation File
Application Visualization System Format
Stardent AVS X Image [XnView]
Winamp Advanced Visualization Studio File
Avid Settings File
Avisynth File (scripting language and filters for non-linear video editing)
.AVX ArcView Extension File (ODB format) (GIS-related file)
Avid Extensions File
.AW HP AdvanceWrite Text File
MS Answer Wizard File
Applix Word File
.AWB Lavasoft Ad-aware Backup File
.AWD Faxviewer Document (AWD Microsoft Fax) [PolyView Viewer]
Award BIOS File
AWK Language Source Code File
.AWE Adobe Acrobat Bookmark XML File
.AWF Qui veut gagner des millions Archive [Dragon UnPACKer]
Who wants to be a millionaire Archive [Dragon UnPACKer]
.AWK AWK Script
.AWM Animation Works Movie
.AWR Telsis Digital Audio File
Ad-aware Referencefile (REFFILE.AWR)
.AWS StatGraphics Data File
.AWX MS DirectX 8.1
.AX DirectShow Filter
MPEG-4 DVD Filter (multimedia codec) [some filters work with Windows Media Player]
.AXD Avery Label Pro Re-Index File
Autodesk Actrix Technical 2000 File
.AXE Paradigm C++ Integrated Debugger File
ChordMaster (Chord Chemistry and Sequencing program for guitarists)
MS Autoroute Export File
.AXG MS Autoroute Trip File
.AXL ArcIMS XML Project File [XML]
.AXP GraphStore eCADLite File
.AXR Telsis Digital Audio File
ElcomSoft Advanced Archive Password Recovery
.AXS MindAvenue AXEL Stream File
.AXT ZenWorks snAPPshot ASCII Application Object Template
Photoshop Replace Color/Color Range
.AY AY Chip Sound File (chip used in ZX spectrum and other arcade machines)
.AZ WinDVD File
.AZZ AZZ Cardfile Personal Information Manager
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.B Limbo Implementation File (Inferno OS)
Brainf*ck Program (small programming language)
Befunge Program
Grand Theft Auto 3 Save File
Applause Batch List
.B02 ADP Payroll (unverified)
.B16 PCO Graphic [XnView]
.B1J BookJones
.B1N 1st Reader Binary Screen Image
.B1S BookSmith
.B30 Ventura Publisher Printer Font
.B3D 3D Builder File
BDE Multipath Movie Digital Viewer
.B4 Helix Nuts and Bolts File (Helix Software now part of McAfee)
.B4S Winamp 3+ Playlist
.B5S Numerical Controlled Machine File (Ball-bar?)
.B64 Base 64 MIME-encoded File [MIME]
.B8 Piclab Raw Graphic File
.B&W Atari Black and White Graphics
1st Reader Mono Binary Screen Image
Image Lab [XnView]
.B_W Atari/Macintosh Black and White Graphic
1st Reader Mono Binary Screen Image
Image Lab [XnView]
.BAC Backup
.BACKUP Ad-aware Referencefile Backup
.BAD Rime Mailer Address File
Oracle BAD File
Brutus Application Definition File (password cracking)
.BAG PMMail Mail Index File
OS/2 Netfinity Manager Sysinfo File (adapter.bag)
AOL Instant Messenger File
Emperor: Battle for Dune Archive [Dragon UnPACKer]
.BAK Backup
.BAL Ballade Music Score
.BAN Sierra Print Artist Banner
.BAR dBase Application Generator Horizontal Menu Object
.BAS BASIC Language Source
Basic Module
.BAT Batch Processing (DOS Batch File)
.BAV The Bat! E-mail Client Anti-Virus File
.BB Papyrus Database Backup
Blitz Basic File
Starfleet Battles DOS Game
.BB2 XBBS-OS/2, XGROUP, AV and ZTree Archiver Control File
.BBC BBC BASIC File
.BBL TeX/BibTeX Bibliographic Reference File
.BBM Deluxe Paint Image File
.BBMA Bonzibuddy
.BBP BitBeamer Split File (of the form .??_??.bbp)
.BBQ BitBeamer Transfer Queue File
.BBS Bulletin Board Sytem Text
.BC Sierra Print Artist Business Card
.BC3 Fiebdc-3 Format File (Format of Interchange ESTANDAR of Data bases of CONSTRUCTION)
.BCC Calendar Creator 8 Collection
.BCF ConfigSafe Snapshot Index
The Sims (Maxis) 3D Body Mesh File
.BCH dBase Application Generator Batch Process Object
Datalex EntryPoint 90 Data File
Phoenix Software (Datalex) Entry Point 90 Data File
.BCK Backup
.BCM MS Works Communications File
.BCN Business Card Pro Design
.BCO Bitstream Fontware File
MicroSim PCBoard Backward Engineering Change Order (layout-to-schematic)
.BCP Borland C++ Makefile
.BCW Borland C++ 4.5 Environment Settings
.BDB MS Works Dababase File
.BDE Borland Database Engine (embedded in many different programs)
.BDF West Point Bridge Designer File
.BDF Egret Data File
X11 Bitmap Distribution Format
Backup To CD-RW Backup Definition File
.BDG Badge Designer 2000 Photo ID
.BDR MS Publisher Border [Buy Office XP at Shop.Microsoft]
.BEC Break Even Calculator
.BED InfoSnorkel Blue Elephant Definition (define content InfoSnorkel extracts from web page)
.BEZ Bitstream Fontware File
.BF Brainf*ck Program (small programming language)
Befunge Program
.BF2 Bradford 2 Font
Bidfax 2000 SE Database (help to obtain bids on jobs that are subbed out)
.BFA Blowfish-encrypted File (Extension added to original) [Program List]
.BFC Briefcase File
.BFF AIX® Backup File Format
.BFFM B17 Flying Fortress Game File (link is to support page)
.BFL Colin McRae Rally 2 Data File
BFLI [XnView]
.BFLI BFLI [XnView]
.BFM UNIX Font Metrics File
.BFX BitFax Document
BFX Bitware [XnView]
.BG MS Backgammon for Windows Game
.BGA OS/2 Graphic Array [XnView]
.BGB MS Chat Background Graphic
.BGI Borland Graphic Interface
.BGL Flight Simulator Scenery File
Babylon Glossary File
.BGM Jane's Combat Simulations F-15
.BH BlackHole Archive Format File [ZipTV]
.BHF pcAnywhere Host File
.BHTML BabuHTML Embedded Software File (example use: netMailshar)
.BHX Archive File
.BI Binary File
Progress Database Before Image File
.BIB Bibliography
Papyrus Database
TeX/BibTeX Literature Database
.BIC Civilization III Scenario
.BID BidMaker 2002 File (software to aid in making bids on jobs)
.BIE JBIG File [XnView]
.BIF GroupWise Initialization File
Image Capture Board Binary Black & White Image
Baldur's Gate Archive [Dragon UnPACKer]
Planescape: Torment Archive [Dragon UnPACKer]
.BIG Chinese (old version)
Cartes Michelin [XnView]
.BIK BioCharter Profile Backup File
Bink Game Video File
.BIL ArcView Image File (band interleaved by line)
.BIN Binary File (many)
.BIO BioCharter Profile File
OS/2 Bios File
.BIP ArcView Image File (band interleaved by pixel)
.BIT Bitmap Image
Worms Armageddon Imported Map
Worms World Party Imported Map
.BIU BidMaker 2002 Update File (software to aid in making bids on jobs)
.BIX Index to a .BIB BibTeX Bibliography Database
BIX Archiver File (no longer produced)
.BIZ Broderbund Print Shop Business Card File
.BJF NTI Backup NOW! File
.BK Backup
LinguAssist File
JetFax Faxbook File
.BK! Backup
.BK$ Backup
.BK? Backup (Can be 1 to 9, usually with WordPerfect)
.BK1 Bach Preludes and Fugues MIDI akmi Source, Book 1
.BK2 Bach Preludes and Fugues MIDI akmi Source, Book 2
.BKC Collectorz.com Book Collector Database
.BKF Moto Racer Archive [Dragon UnPACKer]
MS WindowsXP Backup Utility (Note: This is default; can be renamed to any extension.)
.BKG Background File (used in many games/programs)
UWXAFS Binary Format Data File (absorption data on an energy grid which does not need to be evenly spaced)
.BKI Backup Index
.BKP Backup
.BKR Bruker Aspect NMR Data File
.BKS Bookshelf Backup
IBM BookManager Read Bookshelf
MS Works Spreadsheet Backup
.BKU Timeslips Backup
.BKW FontEdit Fontset Mirror Image
.BLA Blat E-mail (command line E-mail tool written for Windows)
.BLB DreamWorks Resource Archive
.BLD BASIC Bload Graphics
MegaPaint [XnView]
VersaPro Block Build Info
.BLEND Blender 3D File
.BLG Windows Binary Performance Log
(W-2000 & W-XP have different formats. To convert click.)
MicroSim PCBoard Backward ECO Log File
.BLK WordPerfect Temp File
Lightscape Block Library
Alias Wavefront Image
Amiga IFF [XnView]
VersaPro Block
.BLL An extension used by the VBS/European-A worm. If found in the directory
C:\STARTUP suspect you are infected with this worm and have your computer
checked with anti-virus software!
INPRISE Format Language Library (changed to .BTL)
.BLT Wordperfect for DOS File
Saved AIM Buddy List File
.BLW ArcView World File For BIL Image
.BLZ Bitmap Graphic
Twinkle Bulbs Bulb File
Emblaze.Creator File
Blazon Heraldic Shield
Serial Number File [IBM's Drive Fitness Test (DFT) program]
.BM Bitmap Graphic
.BM1 Apogee BioMenace Data File
.BMF Corel Flow Image File [XnView]
.BMI Buzz Instrument
Blue Martini Import File (eCRM)
.BMK Help Bookmark
.BML Bean Scripting Framework (BSF) File (Open with ASCII editor)
.BMP Windows OS/2 Bitmap Graphics
.BMS Backup Magic Backup Set
.BMU Music/Sound File [Open with Winamp or other MP3 player]
.BMW Buzz Music File with Waves
.BMX Buzz Music File
Siemens Mobile Phone Animation
.BMZ Demon Stalkers: Raid on Doomfane (old game)
.BN AdLib Instrument Bank
.BN7 Ox Object-Oriented Matrix Programming Language PcGive 7 Data File
.BNG [Used by program RANGER.EXE] (Marshalling Yard Calculations)
.BNK Adlib Instrument Bank
SimCity Game File
(reported to be) Bink Compressed Video/Audio File
.BNL MicroSim PCBoard Netlist File For The Board Layout
.BNR Binary News Reader File
.BNSKIN Beatnik Clock Skin
.BOB BobDown Downloading Program [Also see Antibob]
Bob Raytracer [XnView]
.BOL MS Booasm Compressed Archive Library
.BOM Orcad Schematic Capture Bill of Materials File
Softshare Delta Business Object Model
MicroSim PCBoard Bill of Materials
.BOO Image File
Book
Compressed Archive File
.BOS Brotherhood of Steel Compressed File (renamed ZIP file; use any extractor)
.BOT Frogbot Editor (Frog = Quake add-on computer opponent)
.BOW Back Orifice 2K Workspace [this is a hacking tool]
.BOX Notes Mailbox
Lemmings Revolution Archive [Dragon UnPACKer]
ThrottleBox Multimedia Viewer
Aladdin Knowledge Systems Vbox Helper Application File (software distribution)
.BOXR Boxerjam Interactive Game System
.BPC Business Plan Toolkit Chart
BuildPro File
.BPL Delphi Library
.BPP MUSICMATCH Burner Plus Project
.BPR Borland C++ Builder 6 Project
BackupXpressPro Project File
.BPS MS Works Document
Bulletproof FTP Settings
.BPT Bitmap Master File
.BPW ArcView World File For BIP Or BMP Images
.BPX Truevision Targa Bitmap [XnView]
.BQW ArcView World File For BSQ Image
.BQY BrioQuery File
.BR Bridge Script
The Playa File (link is tentative)
.BR3 Bryce 3D Scene File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel)
.BR4 Bryce 4 File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel)
.BRC Bryce 2 Scene File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel)
.BRD EAGLE Board File
.BRI Basic Rate Interface File
.BRK Brooktrout Fax-Mail File [XnView]
.BRO Tree Professional Broadleaf Creator File
.BRP Tree Professional Broadleaf Creator Image
.BRS Corel Paint Classic File
RoboHELP Browse Sequence
.BRT Brooktrout Fax-Mail File [XnView]
.BRU Brutus Restore File (password cracking)
.BRW Application file associated with financial institution(s) loan applications (e.g., Calyx Point)
.BRX Multimedia Browsing Index
.BRZ DbBRZ File (Backup or Restore)
.BS Printfox/Pagefox [XnView]
.BS_ MS Bookshelf Find Menu Shell Extension
.BS1 Apogee Blake Stone Data File
.BS2 Basic Stamp 2 Code File (WordPad or BS2-Editor)
.BSA BSARC Compressed Archive
.BSB SWAT Sub-basin Output File (river basin scale model)
MapInfo Sea Chart
.BSC Apple II Compressed Archive
Source Browser Database
Fortran Pwbrmake Object [FORTRAN]
Boyan Script
MS Developer Studio Browser File
.BSE CRiSP Harvest File
.BSK Bryce 4 File
.BSP Quake Map
Half-life/TFC/CS Map
.BSQ Oracle Control File (SQL.BSQ)
Apple II BINSCII-encoded File (often produces a Shrinkit .SHK file)
ArcView Image File (band sequential)
.BST BibTeX Style File
Star Trek: Birth of the Federation Structure/Ship Info File
.BSU Brindys BriTray (software update)
.BSV BASIC Bsave Graphics
.BTAB Base Guitar Tabulature [On-line Guitar Archive]
.BTF Brother Scanner File (supports multiple graphic pages in one file)
.BTL INPRISE Format Language Library (changed from .BLL)
.BTM 4DOS Batch To Memory Batch File
.BTN ButtonWare File
JustButtons Animated Bitmap [XnView]
.BTO Baytex Organix! 2001 Language Kit
.BTR Btrieve Database File
MS Frontpage-related File [Buy Office XP at Shop.Microsoft]
.BTS Creative Digital Blaster Digital VCR File
.BUD Quicken Backup
.BUF WinXL File (Datascope emulation software)
.BUG Bug (Problem) File
.BUL Holiday Lights Screen Saver Bulb File
.BUM Poser Bump [XnView]
.BUN CakeWalk Audio Bundle File
.BUP Backup DVD Info File
PC-Bibliothek Update File
CD Indexer
Brother Embroidery System File
Softcode Tracker Contact Manager Backup (Australian software no longer sold)
.BUT Buttons! Button Definition
.BUY Movie Data File
.BV? WordPerfect Overflow File (Can be 1 to 9)
.BVH Biovision Motion File [Format] (Used by Poser and other software)
.BVS BVS Solitaire Collection
.BW SGI Black and White Image
Silicon Graphics Raw RGB File [XnView]
.BWB Visual Baler Spreadsheet File
.BWI Blindread/Blindwrite
.BWR Kermit Beware Bug List
.BWS Blindread/Blindwrite
.BWT Blindread/Blindwrite [Fantom CD Emulator]
CDmage Table of Contents
.BWV Business Wave File
.BXF Man's Best Friend Software Breeder Exchange Format
.BXX blaxxun Contact
.BYU Movie File (Shockwave)
.BZ Bzip UNIX Compressed File (Open using WinRAR
.BZ2 Bzip UNIX Compressed File (Replaces .BZ) (Open using WinRAR
.BZF Textures and Other Information (used by various games)
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.C C Program File
[Note: Some UNIX compilers use .c (lower case) for C and .C (upper case) for C++]
Check Point Site Configuration for Secure Remote
UNIX Compact File Achive
Desktop Color Separation Specification Cyan Layer (usually an EPS file)
.C?? Winace Compressed File (open with WinRAR)
.C++ C++ Source Code
.C-- Sphinx C-- Source
.C00 Ventura Print File
.C01 Typhoon Wave File (unverified - may just be one of a string of compressed files [see .C??])
.C08 Lord Of Destruction Game File (unverified - may just be one of a string of compressed files [see .C??])
.C2D IsoBuster File
WinOnCd CD Image
.C3D Chem3D Chemical File
.C3T Chem3D Chemical Template File
.C4 JEDMICS (Joint Engineering Data Management) DoD Engineering Data Format [For-pay Viewer]
Edmics [XnView]
.C4D Cinema 4D (3D Modeling texturing and animation program)
.C6 Ashlar-Vellum File
.C86 C86 C Program
.C-- Sphinx C-- Source code
.CA Telnet Server Initial Cache Data File
DATAIR FlexPlus Data File
.CA1 OzWin CompuServe E-mail/Forum Access Catalog File
STABCAL (stability calculation for aqueous systems) File
.CA2 STABCAL (stability calculation for aqueous systems) File
.CA4 Electronics Workbench Circuit
STABCAL (stability calculation for aqueous systems) File
.CA7 Beta 44 Job File
STABCAL (stability calculation for aqueous systems) File
.CAB Cabinet File (Microsoft installation archive)
Install Shield v5.x or 6.x Compressed File (not compatible with MS .CAB files)
.CAC dBase IV Executable File
.CAD Softdesk Drafix CAD File
.CAF Southern Company Terrestrial Data Acq
.CAG MS Clip Gallery Catalog File
.CAL SuperCalc Worksheet
Calendar File
HTML Calendar Maker Pro
DOS Calendar Creator File
Cals Raster File [SwiftView]
Radiance Function File Format
CALS Raster [XnView]
.CALS CALS Raster [XnView]
.CAM Casio Camera Graphic [XnView]
Camtasia Project/Producer Files (screen recording editor)
.CAN Canon Navigator Fax [XnView]
.CAP Ventura Caption
Network Associates Sniffer Capture File
Telix Session Capture
Compressed Music File
.CAPS Visimetrics Digital CCTV Recording (series of JPEG images)
.CAR AtHome Assistant File
Carrara Environment
NeoBook Cartoon [XnView]
Viper Racing Car Description File
.CAS Comma-delimited ASCII File
i2's Case Notebook Timeline Analysis
Casio Program
Cascade DTP File (desktop publishing for browsers using CSS technology)
.CAT dBase Catalog
Quicken IntelliCharge Categorization File
Cognos Impromptu Database Report
OzWin CompuServe E-mail/Forum Access Catalog File
Photomatrix PhotoStudio Graphic [XnView]
.CAZ Computer Associates Archive
.CB MS Clean Boot File
Crystal Button File
Brief Macro Source Code
.CBC CubiCalc Fuzzy Logic System File
.CBF Calendar Builder File
.CBH ChessBase Chess Database File
.CBI IBM Mainframe Column Binary Formatted File
.CBL COBOL Program
Contextual Browsing Language Viewer (usually JavaApplet)
.CBM XLib Compiled Bitmap
Fuzzy Bitmap [XnView]
.CBP CentraBuilder File (web editing) [Expected availability Sep 2002]
.CBS Cardbox Macro Script (database program)
.CBT Computer Based Training
.CBW Cardbox Workspace (database program)
.CC C++ Program File
Visual dBASE Custom Class File
dB2K Custom Class File
Picture Window's Color Curve File (ASCII text file)
.CC1 Chem3D Cartesian Coordinates 1
Briggs Softworks Calendar Commander
.CC2 Chem3D Cartesian Coordinates 2
.CC5 Calendar Creator 5.x 6.x File
.CCA CC:Mail Archive File
Multimedia Fusion File (multimedia game creation - Clik N Create, The Games Factory can open some)
.CCB Visual Basic Animated Button Configuration
.CCC Chat
Curtain Call Native Bitmap Graphic
.CCD CloneCd Related File [Fantom CD Emulator]
Vector CAD Program File
.CCE Calendar Creator 2 Event File
.CCF OS/2 Multimedia Viewer Configuration File
Symphony Communications Configuration File
Remote Control File (various to include: ProtoProEdit, RAVedit)
AudioReQuest Control File
Hallmark Card Studio File
.CCH Corel Chart
Fabasoft Components
.CCL Intalk Communication Command Language
.CCM Lotus CC:Mail Mailbox
.CCN Vitalize! Game File [Played via IE plug-in]
.CCO CyberChat Data File
XBTX BTX Graphics File
MicroSim PCBoard Autorouter Session Output
.CCP C Converter Profiles (construction site management)
.CCR Chat Room Shortcut
.CCS CONKY CeZaR Stribas International
.CCT Macromedia Director Shockwave Cast
Logic Works Schematic File
SIL Hebrew Font System Transliteration Table
MicroSim PCBoard Design Information and Rules For Autorouting
.CCX Corel Compressed Exchange File
.CD cdTree Content List
.CD1 DATAIR Cafeteria Document System Data File
.CD2 DATAIR Cafeteria Document System Custom Text File
.CDA CD Audio Track
.CDB Turbo C Database
Clipboard File
One Page from a ROM With a View Project File
CardScan Database
Nokia 9210/9290 Contact Database (Nokia runs Symbian)
SymbianOS Contact Database File
PowerDesigner Conceptual Model Backup File
.CDBK SPSS Database File [PSPP Free Version Info]
.CDC Chromeleon Driver Configuration Plugin
Nero File (CD burning/design software)
.CDD Chromeleon Device Driver
Claris Draw v 1.2 Document
.CDE Honeywell Hybrid Control Designer (HC900-x Industrial Controllers)
.CDF Comma Delimited Format
Cyberspace Description Format
MS Channel Definition Format
InstallShield Components Definition File
NetCDF Graphic File
MicroSim PCBoard Component Description File For Bill Of Materials
.CDG DART Karaoke Studio CD+G File (contain only song lyrics and synchronization data)
.CDI Phillips Compact Disk Interactive Format
Disc Juggler File (CD-ROM data)
.CDJ Disc Juggler File (CD-ROM data)
.CDK Atari Calamus Document
.CDKEY Protocol Used in Communicating from MediaRemote Server to PC MediaRemote Plug-in (ASCII text)
.CDL CaseWare Working Papers Document Link
SignLab Vector Graphic
.CDM PowerDesigner Conceptual Model File
Visual dBASE Custom Data Module
Compressed Music Format (unverified)
.CDP CD/Spectrum Pro
.CDR Corel Vector Graphic Drawing [XnView]
Raw Audio-CD Data
Sound File [Linux Player]
.CDS ChemDraw Stationery Document
.CDT Corel Draw Template
STABCAL (stability calculation for aqueous systems) File
.CDU CDU Paint [XnView]
.CDX Compound Index [File Structure]
Corel Draw Compressed Drawing
MS Visual Foxpro Index
Active Server Document
ChemDraw Chemical Structure
Microstation Cell Library Index
.CDXL Old Amiga Movie Format
.CDXML ChemDraw XML ChemDraw Format
.CDZ ROM With a View Project File
.CE FarSide Computer Calendar File
Computer Eyes, Digital Vision [XnView]
.CE1 Computer Eyes, Raw [XnView]
.CE2 Computer Eyes, Raw [XnView]
.CE3 Calendar Creator 3.x 4.x Event List
.CEG Continuous Edge Graphic
Tempra Show Bitmap Graphic
.CEI CRiSP Harvest File
.CEL Autodesk Animator Graphic
CIMFast Event Language File
Kiss Paper Doll File
Microstation Cell Library
Kiss Cel [XnView]
Lumena CEL [XnView]
.CEM Empire Earth Game File
.CEN Master Tracker Financial Analysis
.CER Certificate File
Sierra Print Artist Certificate
.CEV Software License Tracking Tool (CERTAUTH.CEV)
LOUT Character Encoding File (High-Level Language For Document Formatting)
.CEX The Currency Exchanger Rate File
INMOS Transputer Development System Occam User Program
ThumbsPlus File (Progressive Multi-image JPEG file)
.CF Imake Configuration File
Sendmail Configuration File
[Other configuration files as well]
.CF4 Catfish File Manager Support File
.CFB Comptons Multimedia File
.CFC Cold Fusion File
.CFF Capabilities File for FOUNDATION(tm) Fieldbus H1 (31.25 kbit/s)
.CFG Configuration (various)
.CFH Capabilities File for FOUNDATION(tm) Fieldbus HSE (100 Mbit/s)
.CFL Corel Flowchart File
.CFM Corel FontMaster
Cold Fusion Template File
Visual dBASE Windows Customer Form
.CFN Atari Calamus Font Data File
.CFO TCU Turbo C Utilities C Form Object
.CFP Complete Fax Portable Fax File
.CFR IBM Configurator Report (if you don't have the program ask the sender to export to .RTF for you)
.CFW ChemFinder Form
.CFX Flow-Cal File (natural gas measurement)
.CG3 Dungeons & Dragons Character File [Editor]
.CGA Ventura CGA Screen Characters
.CGI Common Gateway Interface Script
.CGM Computer Graphics Metafile
.CGP NetCaptor CaptorGroup
.CH Clipper Header
OS/2 Configuration File
.CH3 Harvard Chart (Harvard Graphics taken over by Serif)
.CH4 Charisma 4.0 Presentation
.CHA Adobe Pagemaker Kerning Data
.CHAT PIRCH98 Chat File
.CHD FontChameleon Font Descriptor
ChartFX File
.CHF pcAnywhere Remote Control File
.CHI Chiwriter Document
Help File Index (typically used when the Help file will stay on a CD-ROM -- .CHI speeds access to the info)
.CHJ Help Composer Project
.CHK CHKDSK/SCANDISK Output
WordPerfect Temp File
Sophos Intercheck File
.CHL Chromeleon Channel Raw Data
Configuration History Log
IE Channel Information
.CHM Compiled HTML Help
ChemDraw Chemical Structure (old format)
.CHN Ethnograph Data File
.CHP Ventura Publisher Chapter
.CHQ Help Combined Full-text Search File (produced when multiple .CHM files are merged)
.CHR Character or Font File
.CHS Corel WP Chart Style
ATI Radeon Video Driver File
.CHT Cheat Machine Data File
ChartViewer dBase Interface File
Harvard Graphics Vector File (Harvard Graphics taken over by Serif)
ChartFX Template File
ZSNES Cheat Code (Super Nintendo emulator)
.CI CitectSCADA File
.CIF Ventura Chapter Information
CalTech Intermediate Graphic
Easy CD Creator Image
pcAnywhere Caller File
Ventura Converted Image File
Colombo Ipermedia File
Chip Layout Information
Crystallographic Information File
.CIL Clip Gallery Download Package
.CIM Sim City 200 File
CompuApps Drive Backup Image
CIMEX Cimpack Design Drawing File
.CIN OS/2 Change Control File
Cinetitler Digital Screen Subtitling
Kodak Cineon [XnView]
.CIP Ghost Keylogger File
.CIR SuperMax E-CAD Save-File Command
PSpice File
Flash Color Table
.CIS CheckInbox File
.CIT Intergraph Scanned Image [XnView]
.CIX TCU Turbo C Utilities Database Index
.CK1 iD/Apogee Commander Keen 1 Data File (.CK1 to .CK6)
.CKB Borland C++ Keyboard Mapping File
.CKD CADKEY GraphX File Format (ver 2 and above)
.CKP Ingres Checkpoint File
.CKT Crocodile Clips (Electronic design/physics)
.CL Generic LISP Source Code
.CL3 Easy CD Creator Layout File
Bruker Aspect NMR Data File
.CL4 Easy CD Creator Layout File
.CL5 Easy CD Creator Layout File
.CLA Java Class File (usually .CLASS but can be shortened)
CLARION for DOS
.CLASS Java Class File
.CLB ICQ Contact List
MS Office XP Developer Code Librarian
cdrLabel Compact Disc Label
.CLF ListPro File
.CLG Disk Catalog Database
Maxagrid CTM Log File (text format)
.CLK Corel R.A.V.E. Animation File
.CLL Crick Software Clicker File
OzWin CompuServe E-mail/Forum Access Custom Library Search
.CLO Cloe Ray-Tracer [XnView]
.CLOE Cloe Ray-Tracer [XnView]
.CLP Windows Clipboard/Picture
Quattro Pro Clip Art
CLIPS/wxCILPS File (C Language Integrated Production System)
Clipper 5 Compiler Script
PC Paint/Pictor Page [XnView]
GoDot [XnView]
.CLR WinEdit Colorization Word List
1st Reader Binary Color Screen Image
PhotStyler Color Definition
FileMaker Spelling Dictionary
.CLS Visual Basic Class Module
C++ Class Definition
ArcView Geocoding Classification File
.CLV Aladdin Knowledge Systems Vbox Current Language File (software distribution)
.CLW Microsoft Visual C++ Class Wizard File
CLARION Database (DOS & Windows) [CLARION Magazine]
.CLX Macro ToolsWorks Macro
.CM Craftman Data File
.CM2 Curious Labs Poser Camera File
.CM4 ClipMate Data File
.CMA Applix TM1 Database File (text)
.CMB Chromeleon Backup Archive
.CMC PowerFront File (part of ShopMind)
.CMD OS/2, WinNT Command File
DOS CP/M Command File
dBase II Program File
1st Reader External Command Menu
.CMF Creative Music File
Corel Metafile
.CMG Chessmaster Saved Game
.CMK Card Shop Plus File
.CML Cheat Machine Library File (Windows)
PADGen Company Info File
.CMM CEnvi (ScriptEase:Desktop) Batch File
.CMO Virtools Behavioral Server Composition
.CMP Leadview Bitmap
Discorp CMP Image [XnView]
Open Access File
Address Document
JPEG Bitmap
CorelDRAW Postscript Printer Header
Route 66 Address Document
MS Word for DOS User Dictionary
Generic CADD Component File
.CMQ Culturemetrics (Personality Profile Analyser)
.CMR MediaPlayer Movie
CribMaster File (Toolcrib inventory management)
.CMT Culturemetrics (Personality Profile Analyser)
Chinon ES-1000 Digital Camera [XnView]
.CMU Carnegie Mellon Univeristy Stereo Raster Image
CMU Window Manager [XnView]
.CMV Corel Move Animation
.CMW MS Custom Maintenance Wizard File
COM-Watch (data analyser)
.CMX Corel PhotoPaint Image [XnView]
Corel Presentation Exchange Image [XnView]
The Sims (Maxis) 3D Body Mesh Data
Apple Viewer File
.CNC CNC General Program Data
Click 'n Create File
.CND ControlDraw File
Embroidery Design File [possibly read with Melco Sizer Software]
.CNF Configuration (various)
SpeedDial
.CNM Windows Application Menu Options and Setup File
.CNQ Compuworks Design Shop File
.CNR CRiSP Harvest File
.CNREG EULANDA® Warenwirtschaft (ERP) Configuration Information
.CNREP EULANDA® ERP System Report Template
.CNS W2K Client Connection Manager Export File
.CNT Help File Contents (and other contents needs)
.CNV MS Word Data Conversion File
WS_FTP Pro Upload Conversion File Data
WordPerfect Temporary File
Canvas versions 6, 7, 8
.CO Cult3D ActiveX Player Application
.COB COBOL Program File
Caligari Truespace Format
TrueSpace2 Object
.COD Code List
Compiler Program Code
.COD Multiplan Data File
dBase Template Source File
SWAT Input Control File (river basin scale model)
FORTRAN Compiled Code [FORTRAN]
Video Text File
.COK Carmageddon Patch File
.COL Autodesk Color Palette
Multiplan Spreadsheet
Lotus Notes Import Column Description File
.COM Command (Executable file)
.COMPAT Likely a text file (e.g., README.COMPAT)
.CON Knowledgeware Consolidation File
Tree Professional Conifer Creator File
Simdir Configuration File
.CONF IRC Related Configuration File (IRCDs or EggDrops)
Linux Configuration File (also UNIX)
.CONFIG MS .NET Application Configuration Information
CRiSP Harvest File
.COO Fabasoft Components
.COP Tree Professional Conifer Creator Image File
.COR Protein Structure File
Web GPS Correction Server Export File
WMOVIEC Input File
.COS Scarlett Expert System Compiler Query File (Scarlett is not presently available)
.COV Fax Cover Page (Win2000 Cover Page Editor)
.CP CompuMedic Database (medical billing software)
.CP8 CP8 256 Gray Scale Image [XnView]
.CPA Colasoft Capsa (network sniffer)
.CPD Fax Coversheet
Corel PrintOffice File
Complaints Desk Script
.CPE Fax Coversheet
.CPF Complete Fax File
.CPG 3dize® Cool Page File
.CPH Corel Print House Image
.CPI Code Page Information
ColorLab Image
Calamus [XnView]
.CPJ CeQuadrant CD Project
Commotion File (compositing software tool)
.CPL Control Panel Extension
Corel Color Palette
Compel Presentation
.CPM Cisco Secure Policy Manager File
.CPN Age of Empires II Campaign File
.CPO Corel Print House File
.CPP Borland C++ Builder 6
CA-Cricket Presents Presentation
Maya File
.CPR Corel Presents Presentation
Knowledge Access Graphics
INMOS Transputer Development System Occam Program Code Fold
.CPS Antivirus Checksum File
Central Point PC Tools Backup
Colored PostScript File
Classroom Performance System File
.CPT Macintosh Compressed File
Corel Photo-Paint Image [XnView]
Jasc After Shot (Image Expert 2000 taken over by Jasc from SierraImaging)
dBase Encrypted Memo
CA Cricket Presents Template
.CPT6 Corel Photo-Paint Image
.CPX Control Panel Applet
Code Page Translation File
CryptaPix Encrypted Image
Corel Presentation Exchange Compressed Drawing
.CPY Copy Books Data File
Atari Ramdrive CPY Commands
Flexus COBOL Definitions (function, element and value properties associated with a control)
.CPZ COMPOZ Music Text
.CR CRiSP Source Code
Crack File (produced by several key generator programs)
.CR2 Curious Labs Poser Character File
.CR4 STABCAL (stability calculation for aqueous systems) File
.CR7 STABCAL (stability calculation for aqueous systems) File
.CRA Personal Craft Factory File (no longer supported--GraphicCorp bought by Corel)
.CRD Cardfile (Windows 3.x Database)
Guitar Chord File [On-line Guitar Archive] (Usually an ASCII text file)
.CRF Zortech C++ Cross-Reference File
Database Cross-Reference File
OM2Cipher Recipient File
Sierra Print Artist Craft
System Shock 2 Archive [Dragon UnPACKer]
Thief 2: The Metal Age Archive [Dragon UnPACKer]
Thief: The Dark Project Archive [Dragon UnPACKer]
.CRG Calamus [XnView]
.CRH MS Golf Image File
Links Games Course File
.CRK Crack File (differences between original and cracked files) [Need proper version of CRK.EXE to open]
.CRL Certificate Revocation List
.CRM Capital Research Vendor Bid System
.CRP dBase Encrypted Database
Visual dBASE Custom Report
Corel Presents Run-Time Presentation
.CRS WordPerfect 5.1 for Windows File Conversion Resource
Links Games Course File
Gold Game Course File
.CRT Certificate File
Oracle Terminal Settings Info
UNIX Crontab File (not a required extension for Crontab)
.CRU CRUSH Compressed Archive
.CRW Canon Raw Format (Image) [XnView] [ACDSee 4.0]
.CRX Links Games Course File
.CRY Crypto Chat II Encrypted Notebook-content
.CRZ Links Games Course File
.CS C#.NET Source File
.CSA Comma Deliminated Text
Ultimate Ride Roller Coaster
.CSB Corel Photo-Paint Script
CircuitSoft Viewer (a module of EMSI Complete) - (Unverified)
.CSC Corel Script
.CSD Bitstream Fontware File
Chemsoft® MSDS Database File
Embroidery Design File [possibly read with Melco Sizer Software]
.CSF Van Dyke's CRT/SecureCRT Script File
GeoMedia Coordinate System File
.CSG Statistica Graph File
.CSH Hamilton Labs C Shell Script File
CARA-Script-Interpreter-Engine Script (4th generation database language)
.CSI Cyberautograph Signed Item
.CSK Claris Works
.CSM Borland C++ Symbol File
Borland C++ 4.5 Precompiled Header
Kodak DC265 Camera Script
.CSN Dreamweaver MX's Snippet
.CSP PC Emcee On-Screen Image
CaseWare Working Papers Script Page
Intersystems Caché Server Page File
.CSQ Foxpro Queries
.CSS Hypertext Cascading Style Sheet
Stats+ Datafile
Statistica Datasheet
.CST Macromedia Director Cast File
.CSV Comma-Separated Variables
CompuShow Adjusted EGA/VGA Palette
.CT Scitex CT Handshake Bitmap [XnView]
Iris CT Graphic [XnView]
.CT0 Maxagrid CTM File Being Processed (text format)
.CT1 Maxagrid CTM File Successfully Processed (text format)
.CT2 Maxagrid CTM File Unsuccessfully Processed (text format)
.CTB NoteTab Clipbar
.CTC PC Installer Control
.CTD Cobra Track Dump (COmBined Reconstruction for Atlas)
Cardtable File (text file)
Marine Data File (e.g., automatic float data)
Simpsons Cartoon Studio Export File
.CTF TIFF Compressed File
WhereIsIt Catalog
Symphony Character Code Translation
MGI PhotoSuite 1.0/8.0 Album File
Calculator Text Format
.CTG Cartridge Definition File
ChessBase Opening Book
Canon Powershot Pro 70 Info File
.CTL Setup Information (various)
User Control (various)
.CTM FreeBSD Content Management File
Java Charge Transaction Matrix File
Crazytalk Talking Animation File
Maxagrid CTM File (text format)
SDR99 Speech Recognition Task Time Marked Conversation Input
Content Delivery Service (Web site pending as of Feb 2002)
.CTP American Greetings Greeting Cards
ChemDraw Template
.CTT Hotmail List of E-mail Contacts
LabView File
.CTX Compressed Text
Visual Basic User Control Binary File
Pretty Good Privacy (PGP) Ciphertext File
MS Online Course Text
MS Windows Terminal Server INI Backup File
Chinese Character Input File
.CTY SimCity City File
.CUB OLAP Cube File (definition for SQL Server, any OLE DB, or ODBC-compliant database)
.CUE MS Cue Cards Data
Description File for a CD-Image [Fireburner.com or Goldenhawk.com] or [Fantom CD Emulator]
.CUF Turbo C Utilities Form Definition
.CUL IconForge/ImageForge Cursor Library
.CUP OzWin CompuServe E-mail/Forum Access Catalog Library Update
.CUR Cursor Microangelo
.CURSOR Sun Icon/Cursor [XnView]
.CURXPTHEME Cursor XP File (changes look & function of mouse cursor)
.CUT Dr. Halo Bitmap Graphic [XnView]
INMOS Transputer Development System Occam Utility Package
Utilitaires (multiple utilities)
DataWave Physiological Data File
.CV Corel Versions Archive
MS CodeView Information
.CV4 Codeview Colors
.CV5 Canvas version 5
.CVA Compaq Diagnostics
.CVG Image File
.CVP WinFax Cover Page
Portrait [XnView]
.CVR WinFax Cover Sheet
ElectraSoft Fax Cover Sheet
.CVS Canvas Drawing File
Outlook Express File
Sound File [Linux Player]
.CVT dBase Converted Database
.CVW Codeview Colors
.CW3 Crossword Construction Kit Puzzle Group
Claris Works Win 3 Document (now Filemaker)
Chem Draw Molecular Structure (Lewis structures, orbitals and lab apparatuses)
.CWB WebNote Document
.CWD StarDraft CWAD File (StarCraft Editor)
.CWE Crossword Express
.CWK Claris Works Data also see AppleWorks
.CWP Cakewalk SONAR Audio Project
.CWS Claris Works Template also see AppleWorks
.CWW Crossword Weaver File
.CWZ CropWalker File (Agricultural crop recording)
.CXE Common XML Envelope
.CXT Macromedia Director Protected Cast File
Vegas Jackpot Gold Game Data File
.CXX Zortech C++ Program
.CYN Cynex Root55 Program Extension
.CYP Cypherus Encrypted Archive
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.D Dialect Source Code File
D Programming Language Source Code File
.D?? MicroSim PCBoard NC Drill Data File (?? is the page number within the job) .D_1 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library)
.D_3 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library)
.D$W MindStor Driver (digital wallet)
.D00 Ganbatte! Winamp Plug-in
.D01 Ganbatte! Winamp Plug-in
Note: .D00 and .D01 formats created by Jens-Christian Huus
of the Vibrants and contains OPL2 music data.
.D11 Macro Mania Data File
.D2D 3D Fassade Plus 2D/3D Object File
.D2I Shadowmaster Diablo II LOD Character Editor File
.D2S Diablo II Character and Equipment File
.D2V DVD Ripper File
.D3D CorelDream 3D File
Direct3D File
.D3F MS MechCommander 2 Encyclopedia
.D64 Commodore 64 Emulator Disk Image
.D8A AmBiz Productivity Pak Catalog
.DAD Chromeleon Channel Raw Data
.DAF OM2 911 Xchange Version 3 & 6 Document
.DAN ATI Radeon Video Driver File
.DAO Windows Registry Backup
IsoBuster File
.DAP Omnis5 Application File
MS Access Data Access Page [Buy Office XP at Shop.Microsoft]
.DARBY TheWord & Bible Companion Darby's Bible Translation Bible
.DAT Data (multiple programs)
Note: RDXR020305.DAT is Morpheus adware. Kill this and others with Ad-aware.
WordPerfect Merge Data
(also possibly) MPEG File
VCD and/or SVCD File [Help Site] (play with Media Player)
Mitsubishi DJ-1000 and Photorun Native Format
Gunlok Archive [Dragon UnPACKer]
Nascar Racing Archive [Dragon UnPACKer]
SPOT Graphic [XnView]
SHARP MZ-series Emulator RAM-Disk File
.DAWN Experimental File Format (.DAWN)
.DAZ Poser 3D File
.DB Paradox Database
Progress Database
Solid Database
WindowsXP Thumbnail Database
ANSYS Database
SmartWare Office Pac File (requires login)
Oracle Database
ArcView Object Database File (also ODB)
.DB$ dBASE Temporary File
Clarion Modula-2 Debug Info
.DB2 dBase II File
.DB3 dBASE III File
.DBA DataEase Data File
DarkBASIC File
.DBB ANSYS Database Backup
Mopheus Music File
.DBC MS Visual Foxpro Database Container
PROGNOSIS Database Collection Document File
.DBD Clarion Modula-2 Debug Info
Business Insight Data
Oracle Record Type
.DBE ActiveSync Backup File (Pocket PC backup)
.DBF Database (multiple programs) [started as dBASE] [File Structure]
Oracle 8.x Tablespace File
ArcView Shapefile Attribute Table File (GIS-related file)
.DBG MS C++ Symbolic Debugging Info
Oracle Generator File
ArcView Problem Debug Log File
.DBI Photo Soap2 File
.DBK dBase Database Backup
Orcad Schematic Capture Backup File
.DBL WindowsXP Product Activation File (if on WPA.DBL in the System32 folder)
.DBM Cold Fusion Template
DataBoss Menu Template
DataEase Data File
OzWin CompuServe E-mail/Forum Access SYSOP File
.DBO dBase IV Compiled Program File
.DBOOK Pocket Diary Text
.DBQ Paradox Memo
.DBR Comdial VMMI Database
.DBS SQL Format Database
Word Printer Description File
.DBT Database Text File [dBASE] [File Structure]
Oracle Template
Foxbase Memo
.DBV Flexfile Memo Field File
.DBW DataBoss Database File
.DBX Database (multiple programs)
DataBeam Image
MS Visual Foxpro Table
.DC DesignCAD CAD File
.DC2 DesignCAD CAD File
Kodak DC25 Digital Camera File
DC2-PC Motion Control Command Language File
.DC5 DataCAD Drawing File
.DCA Visual Basic Active Designer Cache
IBM DisplayWrite Document Content Architecture Text File
D-PAS Portfolio Manager File [Education about D-PAS]
.DCB Concordance Database Control Block
.DCD Document Content Description File
FORTRAN Data File [FORTRAN]
INMOS Transputer Development System Occam Object Code
Dynamic-CD-Wizard Project File
.DCF Design Rule for Camera File Systems File
DynSite Configuration File
Dyadic Data File
Disk Image File
.DCL DumpSec
DesignComposer Addition to Layout Knowledge Base
.DCLST DC and DC++ Direct Connect [File sharing network using DC++]
.DCM DCM Module Format
Dicom [XnView]
.DCP Delphi Compiled Packages
OS/2 Data CodePage
ArcView Default Codepage File
.DCR Shockwave File
Kodak Proprietary Image Format
.DCS Quark Desktop Color Separation Specification
ACT! Activity Data File
.DCT Dictionary (various)
MS Visual Foxpro Database Container
ArcView Geocoding Dictionary File
.DCU Delphi Compiled Unit
.DCV DriveCrypt Volume
.DCW Draft Choice for Windows
.DCX FAX Image
ElectraSoft Fax
PC-Paintbrush File [SwiftView]
Bitmap Graphics
Macros
MS Visual Foxpro Database Container
.DD Macintosh Compressed Disk Doubler Archive
C64 Doodle [XnView]
.DDB Device-Dependent Bitmap Graphics File
Design Database File (database definition file) [MS Access???]
INMOS Transputer Development System Occam Debugging Info
Protel 99SE Design Database File
.DDATA Pocket Diary Text File
.DDE Dynamic Data Exchange
.DDF BTRIEVE Data Dictionary File (allows other programs to access data)
Bitstream Fontware File
Doom Definition File
Music Library File
Grand Theft Auto 3 File [GTA3 Forum]
.DDI DiskDupe Image
Disk Doubler Image
.DDL MS Data Definition Language File (SQL Server Query Analyzer)
.DDM Intelliware Data Modeller (Data Mapping and Aliasing)
.DDNA Miramar Systems Desktop DNA (migration tool)
.DDP OS/2 Device Driver Profile File
Delphi 6 File
.DDS INMOS Transputer Development System Occam Compiler Descriptor
Photoshop Compressed Textures
.DDT Neurological Data for Statistical Analysis [File Format & More Info]
.DDX Juno "Get" File
Device Data Exchange Format File (text CAD design exchange format)
.DDW CSPro File (combined IMPS and ISSA Census Processing System)
.DE MetaProducts Download Express Incompletely Downloaded File
.DEB DOS Debug Script
Debian Linux Package
.DEC VersaPro Declaration File
ArcView UNIX Hyperhelp Supporting File
.DEE Creator Simulation File
.DEF ArcView Defaults File (North Arrows, Layout Templates, etc) (ODB format)
.DEM ArcView Digital Elevation Model File
.DESK Card Deck File
.DESKLINK MS Windows Explorer Desktop Controls
.DEF Definitions
Defaults
SGML Tag Definition
Modula-2 Definition Module File
SmartWare II Data File
C++ Definition
3D Fassade Plus Define Module File
Geoworks Assembly Header File
.DEI Gerber Design Engineered Interface
.DEL Data
Creator Simulation File
.DEM Descent Demonstration
USGS Map
Digital Elevation Model File (GIS-related file)
Half-life Game File
Creator Simulation Temp File
.DEO Creator Simulation File
.DEP Setup Wizard Dependency
.DEPLOY DeployMaster Setup Script
.DER Certificate File
.DES Description Text
Tribes 2 Game File
Quickbooks Template
Pro/DESKTOP File
Interscope BlackBox File (encryption program)
Creator Simulation File
.DEU ATI Radeon Video Driver File
.DEV Device Driver
Device Independent TeX
LaTeX File
.DEX WinGlucofacts File (diabetes management software)
.DEZ DES Encrypted Zip File
.DF Lightscape Parameters
.DF1 Omnis7 and Omnis Studio Database File (also .DF2, .DF3, etc.)
.DFA Amateur Strip Poker Data File (NOTE: Site opens with barely-clad ladies)
.DFC Voicemail File (Trio Voice Communications and maybe others)
.DFD File Flow Diagram Graphic
.DFF Digital Animation Format
Grand Theft Auto 3 Export Format [Model Editing]
.DFI Digifont Outline Font Description
.DFL Signature Default Program Settings
.DFM Borland C++ Builder 6 Form
Borland Delphi Form
File Flow Diagram Model
.DFP Stabilogram Diffusion Analysis File (Requires MatLab)
Digital Fusion Plug-in
.DFS Delight Sound File
.DFT Fakt2000 File
SolidEdge CAD File
Workshare Synergy File
PC Draft File
.DFV Word Print Format Template [Buy Office XP at Shop.Microsoft]
GYYR DVMS Digital CCTV Recording
.DG Autotrol Graphics
.DGC TurboTax-related File
.DGK Delcam Powershape/Powermill (3D CAD)
.DGN Microstation CAD Drawing File
Intergraph Graphics
Dragon 32 Emulator
Bentley, MicroStation, CAD
ArcView Design Drawing File (Intergraph)
.DGO Dimitrius Settings File (Dimitrius is program author)
.DGR Fax Page (MS Outlook Express)
DART Pro 98 File Group Details
Keeptool ER Diagrammer
.DGS AT Advanced Diagnostics File
.DH Geoworks Dependency Information File
.DHE MS Help Workshop Dialog Box Help Editor Document
.DHP Dr. Halo PIC
.DHT Gauss Data File
Ox Object-Oriented Matrix Programming Language Gauss Data File
.DIA Computer Support Corp Diagraph Graphics File
DIA Drawing
.DIB Device-Independent Bitmap Graphic
.DIC Dictionary (various)
.DIF Data Interchange Format
DIFF Command Output (patch script)
.DIG Text Document
Digilink Format
Sound Designer Audio File
.DIL DesignComposer Input DIL Script
.DIN DataEase File
ADC Labs eWave File (broadcast automation software)
.DIP Graphics File
.DIR Procomm Plus Dialing Directory
Macromedia Director File
DEC VAX Directory
Worms Armageddon Archive [Dragon UnPACKer]
ArcView INFO Directory Manager File
.DIS DKB Ray Tracer File [XnView]
DATAIR Data Import Specification Layout File
VAX Mail Distribution File
Corel Draw Thesaurus
.DISCO MS .NET Web Service Discovery File
.DIT MS Win2000 Active Directory Schema
.DIVX Movie Encoded with DivX-codec
.DIZ Description In Zip File
.DJE MattBatt iAM-player
.DJV DjVu File [XnView]
.DJVU DjVu File [XnView]
.DKB DKBTrace Ray-Traced Graphics File
.DL Animation File (this appears to be associated with glifomon.zip, a probable porno file)
Masked .DLL File (often used by malware to hide .DLL files from virus scanners [e.g., Sub7])
.DL_ Compressed .DLL File in an Install Archive
.DL4 Lindab Dimsilencer File
.DLC Echelon HQ Configuration File
Model Dislocation File
3D Studio Max Animation Controller File (Character Studio)
.DLD Lotus File
.DLE Macromedia Designer 3D Translator File (Also 3D Studio Max)
.DLF Belkin Router Firmware Update
.DLG Dialog Resource Script
C++ Dialogue Script
Infinity Engine Game Dialog File
Digital Line Graph (U.S. Geological Survey geographic database)
MicroSim PCBoard NC Drill Descriptive File
ArcView Digital Line Graph File
.DLK INMOS Transputer Development System Occam Compiler Link Info
.DLL Dynamic Link Library
CorelDraw Export/Import Filter
.DLM Dirty Little Helper Cheat File
Dynamic Link Module
ASCII Delimited File (sometimes used in voting systems)
3D Studio Max Character Studio
.DLS Downloadable Sounds (Interactive Music Architecture)
Norton DiskLock Setup File
ADAPTA DLS/32 Supply Chain Planning (ASCII file with general number data)
dataLive Database Engine File
.DLU Dirty Little Helper Update File
.DM2 Quake 2 Demo File [Viewer]
.DM3 Quake 3 Arena Demo File [Viewer]
.DM_48 Quake 3 Arena Demo File [Viewer]
.DM_57 Return to Castle Wolfenstein Demo File [Download site]
.DM_59 Return to Castle Wolfenstein Demo File [Download site]
.DM_66 Quake 3 Arena Demo File [Viewer]
.DM_67 Quake 3 Arena Demo File [Viewer]
.DMC Medical Manager DML System Compiled Script
.DMD Visual dBASE Data Module
dB2K/dQuery Web DataModule
OS/2 Warp Device Manager Driver
.DME Medical Manager DML System Data Merge
.DMF Delusion/XTracker Digital Music File
Packed Amiga Disk Image
.DMG Macintosh OS X Disk Image File (Treated like a real disk)
.DMK Digimask File (3D human faces)
.DML Darn! Shopping! Mall File
Medical Manager DML System Script
.DMO Derive Demo
.DMP Dump (various)
INMOS Transputer Development System Occam Core Dump
.DMS Amiga DISKMASHER Compressed Archive (see ADF) [Amiga Forever]
.DMT Delcam Machining Triangles (3D CAD)
.DMX Medical Manager DML System Index for Custom .DME Files
ProTrader Database
.DN8 Blue Martini UTF-8 Encoded DNA File (eCRM)
.DNA Blue Martini DNA File (eCRM)
.DNA.XML Blue Martini XDNA File (eCRM)
.DNC Machine Tool Communications
.DND ClustaW Tree File
.DNE Darn v5+ (Windows) Events List
Netica Bayes Net File
.DNG Dungeon File (created by ID software)
.DNI realMyst 3D Archive [Dragon UnPACKer]
.DNL DigitalWebBook Electronic Book (requires installation of DigitalWebBook plug-in)
netMod Modem Firmware Upgrade File
.DNS DynSite Plug-in File
.DO Stata Batch Analysis File
DigitalOutrage Hosting Control Panel Info
MicroSim PCBoard File With Autorouting Control Information
.DOB User Document Form File
.DOC Document or Documentation (many programs/formats)
MS Word Document [Buy Office XP at Shop.Microsoft]
DisplayWrite 4 File
.DOCHTML MS Word HTML Document [Buy Office XP at Shop.Microsoft]
.DOCMHTML MS Word HTML Document [Buy Office XP at Shop.Microsoft]
.DOF Racer 3D Geometry File
.DOG Laughing Dog Screen Saver
.DOH Geoworks Dependency Information File
.DOL D-PAS Portfolio Manager Flexible Benchmarking Analysis File [Education about D-PAS]
.DOO Atari Doodle [XnView]
.DOP Digital Orchestrator File
.DOQ Digital Orthophoto Quadrangle (digital aerial photo)
.DOQQ Digital Orthophoto Quarter Quadrangle (smaller digital aerial photo)
.DOS Text File/DOS Specification Info
1st Reader External Command File
Network Driver File
.DOT MS Word Document Template [Buy Office XP at Shop.Microsoft]
Corel Lines-Definition
.DOTHTML MS Word HTML Document Template [Buy Office XP at Shop.Microsoft]
.DOX Text File
MultiMate Document
User Document Binary Form File
.DOZ VENDINFO Description Out of Zip File
.DP Daily Planner Calendar File
DataPhile Data File
.DPA Serif DrawPlus Animation
.DPB Dataplore Signals (analysis of signals and time series data)
.DPC DiscPlay Collection File
Delphi Package Collection File
OrCad Design Rule Check Output
.DPD OmniServer File (OPC/DDE Server)
.DPF COMPRESS Vessel Drafting Program File (AutoCAD add-in)
DeltaDOS Delta Patch File
F-Secure Configuration File (FSMA.DPF)
Dataplore Figure (analysis of signals and time series data)
Dictaphone Walkabout Express (unverified)
.DPJ DeskProto CAM Project File
.DPK Delphi Package File
Lemon Interactive Starmageddon File
.DPL Borland Delphi 3 Packed Library
Digital Photo Librarian Database
.DPP Serif DrawPlus Drawing
.DPR Borland C++ (or Delphi) Default Project
.DPS DivX XP Skin (.ZIP file format)
DPS Reality Video Editing File
.DPT Publish-It! Publication File
.DPX Digital Moving Picture Exchange [XnView]
.DPY Realpolitik Saved Game
PROGNOSIS Display Document File
.DQA itaz doQument File
.DQB D-PAS Portfolio Manager File [Education about D-PAS]
.DQD itaz Default doQument Database
.DQY MS Excel ODBC Query File [Buy Office XP at Shop.Microsoft]
.DR9 Directory File
.DRC Orcad Schematic Capture Design Rules Check Report File
DriveCrypt Container File (Note: This extension was changed to .DCV due to a WinXP conflict.)
Borland Delphi Compiled Resource File
MicroSim PCBoard DRC Errors Report
.DRES Diagnosis Results
.DRJ Deraj Data File
.DRL DocObject Resource Locator
.DRM Steinberg Cubase Drum File
.DRN Darn for DOS
.DRS WordPerfect Driver Resource
Age of Empires 2 Archive [Dragon UnPACKer]
.DRV Device Driver
.DRW Drawing (various)
Micrografx Vector Graphic
Pro/E Drawing
.DRX Adobe Photoshop Tutorial
.DRZ Draz Paint [XnView]
.DS Chemisty Software
PhotoMax Drive
HP Officejet T Series All-in-One TWAIN File
.DS4 Micrografx Designer Graphics (ver 4)
.DSA DasyTec DASYLab File
.DSASAVE MS Dungeon Siege File [View with Tankviewer]
.DSB DasyTec DASYLab File
.DSC Oracle Discard File
Nikon Coolpix Disk Identification File
dpkg-source (info needed help unpack Debian source archives)
.DSCE Diagnosis Scenario
.DSD DataShaper Database File
Document Structure Definition File
.DSES Diagnosis Session
.DSF Micrografx Designer
PC-TRUST Document Signer (Extension means file is signed)
Delusion/XTracker Digital Sample
Vicon Kollector 2.0 CCTV Recording (likely a wavelet format)
.DSG Doom Saved Game
.DSH Dashboard PDA Wallpaper
.DSI Digital Sound Module Tracker Format (unverified)
R-Studio Hard Disk Scan Results File
.DSK Borland C++ or Turbo Pascal Project Desktop File
Novell Driver File
Lotus Notes Design Elements
SHARP MZ-series Emulator File
.DSL Lingvo User Feature Dictionary
.DSM Delphi Symbol File
Digital Sound Module Tracker Format
Dynamic Studio Music Module
.DSMAP MS Dungeon Siege File [View with Tankviewer]
.DSN ODBC Data Source
SureThing Office Labeler (formerly DesignExpress) Document
Object System Designer Design
Orcad Schematic Capture Schematic File
CD Stomper Pro (CD/DVD Labels) (unverified)
.DSO Tribes 2 Compiled Script
.DSP Signature Display Parameters
Dr. Halo Graphic Screen Driver
MS Developer Studio Project
.DSPARTY MS Dungeon Siege File [View with Tankviewer]
.DSQ Corel QUERY File
DASYLab Worksheet Sequence
.DSQSAVE MS Dungeon Siege File [View with Tankviewer]
.DSR WordPerfect Driver
Active Designer File
.DSRES MS Dungeon Siege Texture File [View with Tankviewer]
.DSS Digital Soup Digital Sound File
DCC Active Designer File
Digital Speech Standard File (Voice Recorders & IBM's ViaVoice)
.DSSAVE MS Dungeon Siege File [View with Tankviewer]
.DSST ConsumerPoint File (CACR Marketing)
.DST PC-RDist Distribution File
Embroidery Machine Stitch File (VeePro) [possibly read with Melco Sizer Software]
.DSW MS Developer Studio Workspace
Borland C++ Desktop Settings
.DSX Active Designer Binary File
.DSY PC Draft Symbol Library
.DSZ Embroidery Machine Stitch File (VeePro)
.DT_ Macintosh Data File Fork
.DT5 Brother's Keeper File (genealogy software)
.DTA Data (Various)
Stata Binary Saved Datasets
Hidden & Dangerous Archive [Dragon UnPACKer]
.DTB DesignTools PCB Design and Make (printed circuit design - common in UK schools)
.DTD SGML Document Definition File
DesignTools 2D Design (vector drawing - common in UK schools)
ArcView UNIX Hyperhelp Supporting File
.DTEA Diagnosis Template Archive
.DTF Q&A Database
MS Exchange Header File (Used when sending to Lotus Notes)
.DTL Hal/Supernova/Lunar/LunarPlus Screen Readers/Magnifiers
.DTM DigiTrekker Module
Softshare Delta Translation Map
.DTP SecurDesk! Desktop
Timeworks Publisher Text Document
Publish-It! Publication
Pressworks Template File
.DTQ Database Tools Query
.DTS Digital Surround Audio File Format
MS Data Transformation Services (Data Transformation Packages used by MS SQL Server)
.DTX LaTeX Source and Documentation Archive
E-Book File
DocuTech Print6 Engine File (Prints DocuTech Closing Documents)
LithTech Model Texture File
.DUN Dial-Up Network
.DUP Duplicate Backup
.DUS Readiris Font Dictionary
.DV DESQview Script
Digital Video File
.DVB Visual Basic for Applications Macro Project
.DVC Lotus File
.DVF DV Studio Camcorder Graphics File
.DVI TeX Device Independent Document
.DVP DESQview Program Information
AutoCAD Device Parameter
.DVR Device Driver
.DVU DVBControl (recorded video or audio playlist)
.DW2 DesignCAD Drawing File
.DWC Compressed Archive
.DWD DiamondWare Digitized File
Davka Writer File (Hebrew editor)
.DWF Autodesk WHIP! Drawing Web File
MS WHIP autoCAD REader Drawing Web File
.DWG AutoCAD Drawing Database
Drafix Drawing
BravoDRAFT, Detailer
.DWI Dance With Intensity (dance simulator)
.DWK Locked DWG File
.DWN Cisco Download File (usually a system update)
Firmware Update File (several)
Experimental File Format (.DAWN)
.DWP Dweep Game Levels
DeScribe Document File
.DWS Dyadic Workspace File
AutoCAD Standartization File
.DWT AutoCAD Template/Prototype File
Macromedia Dreamweaver Template File
Demon's World Game Texture File
.DWY Dwyco Video Clip
.DX Document Imaging File
Digital Electric Corporation (DEC) Data Exchange File
Deus Ex File
.DXB Drawing Interchange Binary
.DXF AutoCAD Drawing Interchange Format
.DXL Dapyx MP3 Explorer (MP3 database organizer)
DOORS Extension Language
.DXMAX Oozic File
.DXN Fujitsu dexNet Fax Document
.DXPACK DesktopX Object (customizes the Windows Desktop)
.DXR Vegas Jackpot Gold Game File
Macromedia Director Protected Movie File
Dependable Strengths Administrator Resources (Macintosh)
Green Building Advisor File
AEC DesignWare Model Parameter File
.DXTHEME DesktopX Theme File (customizes the Windows Desktop)
.DYC ICUII Videochat File
.DYLAN Dylan Source File
.DYN Lotus File
.DZ Dzip Compressed File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.E Specman Testbench E-program Source File
.E00 ArcInfo Coverage Export File (GIS-related text file)
.E01 Encase Forensic Software
.E2 thinkdesign CAD Design
.E3 thinkdesign CAD Design
.E48 Emu48 HP48 Emulator File
.E78 IBM 3270 Terminal Emulator Screen Layout Definition
.EAC EmEditor Auto Completion File
.EAF Aframe File (suite of generic testing and assessment software)
MicroEmacs Abbreviation File Format
FRAGSTATS*ARC File (Landscape Structure/Spatial Pattern Analysis for ARC/INFO)
.EAL Enfocus Action List
.EAR Java Enterprise Application Packaging Unit
.EAS Elite Visual Basic API Spy (Use care entering this site)
.EAZ Express Assist File
.EBF Pocket PC WindowsCE Form File
EARS Definition Backup (EARS = UK Liberal Democrats Election Agents Record System)
.EBJ Geoworks Error Checking Object File
.EBK EARS Database Backup (EARS = UK Liberal Democrats Election Agents Record System)
.EBM Attachmate Extra! Macro
.EBO Microsoft Reader Ebook Format
.EBP Pocket PC WindowsCE Project File
.EBS WindowsXP Scanner File
.EBX Electronic Book Exchange (Open Source) [Adobe reader]
.ECA electroCAD File
.ECC Ecchi Role-playing Format (Generally X-rated Anime File) [XnView]
.ECF WinFax Office Add-in File
MS Outlook Add-in File
.ECO NetManage ECCO File [Alternate site]
.ECR Ecrypt E-mail File
.ECS Encrypted Compressed GIS Software Geographic Shape File [GIS info]
(ArcView, et.al.) (JShape/FShape)
.ECW Ensoniq Waveset Format
EclipseCrossword Crossword Puzzle
Enhanced Compressed Wavelet [XnView]
.ECW2002PUZZLE EclipseCrossword Puzzle
.ECW2002WORDS EclipseCrossword Word List
.ED EasyDraw CAD File (Japanese CAD program)
.ED5 EDMICS Graphics File
.ED6 EDMICS Graphics File
.EDA Ensoniq ASR Disk Image
.EDB ROOTS3 Geneological Data
.EDC Kryptel (light) Decoder/Encoder
.EDD FrameMaker Element Definition Document
.EDE Ensoniq EPS Disk Image
.EDF Workshare Synergy Document Change Management
.EDK Ensoniq KT Disk Image
.EDL Edit Decision List (management for video and film post production)
.EDM CAD Contouring Parameter Data File
Extinction Corrected Differential Photometry
Setters III 3 Map File (prior to .MAP conversion)
.EDML Dreamweaver MX Extension File
.EDN EDIF Netlist File (Xilinx ISE FPGA Compiler)
.EDP Attachmate Extra! Session
.EDQ Ensoniq SQ1/SQ2/KS32 Disk Image
.EDS Ensoniq SQ80 Disk Image
.EDT VAX Edt Default Settings
.EDV Ensoniq VFX-SD Disk Image
.EEB WordPerfect Equation Editor Button Bar
EaseBook File (Word add-on for writing books and articles in XML)
.EES Empire Earth Scenario File [SCN Punk Site]
.EFA Ensoniq ASR File
.EFC EFCoins File
.EFD EARS Filter Definition (EARS = UK Liberal Democrats Election Agents Record System)
.EFDEMO Star Trek Voyager Elite Force Demo File [Viewer]
.EFE Ensoniq EPS File
.EFF IEEP TeamBG File (modify Infinity Engine games)
EverQuest Effects File
.EFK Ensoniq KT File
.EFQ Ensoniq SQ1/SQ2/KS32 File
.EFS Ensoniq SQ80 File
.EFT Chiwriter High Res Screen Characters
.EFV Ensoniq VFX-SD File
.EFX eFax.com Fax Document (Used to be JetFax in 1999)
.EGA Ventura EGA Screen Characters
.EGD GIS Software Encrypted Grid Shape File [GIS info]
(ArcView, et.al.) (JShape/FShape)
.EGS GIS Software Encrypted Grid Shape File [GIS info]
(ArcView, et.al.) (JShape/FShape)
.EHTML Enhanced HTML
.EI Electric Image [XnView]
EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.EID Faena MyID Encrypted File
IBM ViaVoice Vocabulary File
.EIDI Electric Image [XnView]
.EK5 Simrad EK500 Scientific Echosounder Data [Use Echoview to analyze]
.EK6 Simrad EK60 Scientific Echosounder Data [Use Echoview to analyze]
.EKM EXP: The Scientific Word Processor Macro
.EL eMacs Lisp Source Code
.ELC eMacs Lisp Byte-compiled Source Code
.ELD EARS Label Definition (EARS = UK Liberal Democrats Election Agents Record System)
.ELETTERHEAD Electronic Letterhead
.ELF Black Belt Systems Extended Layer File
Tasklink for Windows Machine Control Executable and Linking Format
.ELG EARS Log (EARS = UK Liberal Democrats Election Agents Record System)
.ELI Encyclopedia Article List
.ELL ATI Radeon Video Driver File
.ELM MS FrontPage Theme-Pack File [Buy Office XP at Shop.Microsoft]
.ELOG McAffee Firewall Log
.ELT Event List Text
.EM1 Emax I Bank File
.EM2 Emax II Bank File
.EMAIL Outlook Express Mail Message [Buy Office XP at Shop.Microsoft]
(Rename to .EML to access in OE but beware of viruses and worms)
.EMB Everest Embedded Bank File
IEMBL Nucleotide Format (MIME type chemical/x-embl-dl-nucleotide)
.EMBL IEMBL Nucleotide Format (MIME type chemical/x-embl-dl-nucleotide)
.EMD ABT Extended Module
.EMF Extended Windows Metafile Format
.EML MS Outlook Express Electronic Mail [Buy Office XP at Shop.Microsoft]
Note: .EML files with "funny" names in multiple folders implies the Nimda worm.
QuickMail Pro
.EMM EARS Mail Merge Definition (EARS = UK Liberal Democrats Election Agents Record System)
.EMR Emrite (Wordprocessor file)
.EMS PC Tools Enhanced Menu System Config
YoshimuraEMS Motorcycle Fuel Injection
.EMU Emulation
.EMX Enigmacross Puzzle File (Develop professional acrostic puzzles)
Emax System File
.EMY Eericsson Ringtone
.EMZ Windows Compressed Enhanced Metafile (MS graphic format for Office and Visio)
.ENC UUENCODE Encoded File
Video File
BlackIce Evidence Log File
Knowledgeware Encyclopedia
Encore Music File
Dungeon Related File (created by ID software - tied to .DNG file)
.END Corel Arrow Definition
.ENF RightClick-Encrypt File
EndNote Filter File
.ENG Dictionary
Sprint Dictionary Engine File
EnerGrahics Chart Graphics File
.ENH CRiSP Harvest File
.ENL Endnote Library File (for research papers)
.ENR Enroute Toolath
.ENS EndNote Styles File
.ENT Entrust Entelligence Secured File
.ENU ATI Radeon Video Driver File
.ENV WordPerfect Environment
WOPR Enveloper Macro
Acrobat Spelling File
Sierra Print Artist Envelope
The Golem Project Environment File
Motocross Madness 2 Track
.ENW Sierra LandDesigner 3D Terrain Modeling
.ENZ EndNote Connection File
.EON EON Studio File (Interactive 3D authoring)
.EOP EON Studio File (Interactive 3D authoring)
.EOT MS WEFT Embedded OpenType File
.EOX EON Studio File (Interactive 3D authoring)
.EOZ EON Studio File (Interactive 3D authoring)
.EP Bonas Jaquard EP Weave Format File
.EP2 EclipsePackager Package
.EPA Award BIOS Logo [XnView]
.EPD Express Publisher Publication File
EARS Printer Definition (EARS = UK Liberal Democrats Election Agents Record System)
.EPE EON Studio Personal Edition File (Interactive 3D authoring)
.EPH NOAA Post-fit GPS Orbit Data
.EPI Express Publisher Document File
EclipsePackager Invoice
EPS Interchange Format [XnView]
.EPL Tallyman E-commerce Software?
.EPP EditPad Pro Project
.EPR Eiffel Project Repository
.EPS Encapsulated PostScript [XnView]
Ventura Printer Font
.EPZ EON Studio Personal Edition File (Interactive 3D authoring)
.EQL DART Pro 98 Fabric Equalization Presets
.EQN WordPerfect Equation
.EQT ReliaSoft Weibull++ 6 (Life Data Analysis Software)
.EQW SPEFO Stellar Spectra Analysis File
.ER1 ERWin File
.ERD Entity Relationship Diagram
.ERF Neverwinter Nights Toolset Exported Resource
.ERI Entis Rasterized Image (ERI-chan) [XnView]
.ERM Entity Relationship Diagram Model
.ERP British Economics & Social Research Council Electronic Form
NOAA Post-fit GPS Earth Rotation Parameters
.ERR Error Log (various - many associated with install programs)
.ERS EARS Control File (EARS = UK Liberal Democrats Election Agents Record System)
.ERX ERWin File
.ES EasySIGN Drawing Sheet
.ESF Emblaze Audio File
.ESH Extended Shell Batch File
.ESI Esri Plot File
.ESL MS Visual FoxPro Distributable Support Library
Everest Authoring System Screen Library (computer-based training)
.ESM Enhanced Simplex [XnView]
.ESP Ventura File
ACD/CurveManager Analysis File
Ethos System Analysis File
ACD Analysis File (Advanced Chemistry Development)
E$Planner File
.ESR 4D Database Windows Procedure
.ESS EXP: The Scientific Word Processor Style Sheet
.EST MS Streets & Trips 2001 Trip File
ICE 2000 File (Interactive Cost Estimating)
.ESY EmEditor Syntax File
.ET2 Electronic Tax Return Security File (Australian taxes)
.ETA eTreppid Audio File (eTplayer & ETVC media CODEC)
.ETB Seismograph File (compressed?)
.ETC eTreppid Compressed File
Seismograph File
.ETF Enriched Text File [Info]
.ETH Ethnograph Document File
.ETM eTreppid Audio File (eTplayer & ETVC media CODEC)
.ETV eTreppid Audio File (eTplayer & ETVC media CODEC)
.ETX SetText Structure Enhanced Text
.EUC Japanese (Kanji)
.EUI Ensoniq EPS Family Compacted Disk Image
.EUK Euklides Dynamic Geometry
.EUM Euklides Dynamic Geometry
.EUS EDonkey2000 Serverlist Tool
.EV EchoView File (sonar fishing data)
EV8 File (Virtual Reality applications)
.EV2 Java File
.EV3 EVERLOCK Options File
.EV6 EV8 File (Virtual Reality applications)
.EVA Viz Modeler 3D Scene Archive (used for TV graphics)
.EVB Embedded Visual Basic File (used on Pocket PCs) [Developer info]
.EVC EchoView Color Scheme (Echocolor-created data)
.EVI EchoView Index File (speed up processing of echosounder data)
.EVK EVERLOCK File
.EVL EchoView Line File (echosounder time/depth coordinates)
.EVO CRiSP Harvest File
.EVR EchoView Region File (echosounder time/depth coordinates)
.EVT PC Tools Event File Scheduler
MS WinNT/2000 Event Viewer Log File
Cameo D1 Digital CCTV System Recording Event Log (JPEG files with associated *.LOG files)
.EVY Envoy Document
.EWB Electronics Workbench
.EWD Express Publisher for Windows Document
.EWL MS Encarta Document
EclipseCrossword Word List
.EWP QuickCog Project File
Evidence Washer Plug-In (erases your Internet tracks)
.EWS QuickCog Sample Set File
.EX EPM Macro File (software install)
Euphoria File (Programming language)
.EX2 PC Doctor File (HP computer - unverified)
.EX3 Harvard Device Driver (Harvard Graphics taken over by Serif)
.EX^ Norton Live Update File
.EX_ Compressed .EXE File in an Install Archive
.EXA Examine32 Saved Search Parameters (text search utility)
.EXB Flash Image File
.EXC QEMM Exclude File
REXX Program
MS Word Exclusion Dictionary [Buy Office XP at Shop.Microsoft]
Text Document
.EXD Control Information Cache
.EXE Executable File
Out-of-process Code Component Used by COM Clients (Component Object Model)
Settlers IV Saved Game
.EXF Fuji EXIF Format File (Any JPEG viewer should view) [File Format (PDF)]
.EXM HP Calculator Executable
.EXP ICQ Saved Chat File
Embroidery Design File [possibly read with Melco Sizer Software]
.EXT Norton Commander Extension File
WS-FTP ASCII Binary Transfer File
E-mail Text Attachment (unverified)
Extinction Corrected Photometry
.EXU Euphoria File (Programming language)
.EXW Euphoria File (Programming language)
.EXX IBM LinkWay MsgPut Intermediate File
.EYB Encyclopedia Yearbook File
.EYE Glass Eye File (stained glass window design)
.EZC EZScreen Screen Saver Editor
.EXF Calculus EZ-Fax Fax
.EZM Text File (From some mailing lists)
.EZP Edify Electronic Workforce Backup Utility
.EZS Sunburst Technology Easy Sheet Document
.EZT Sunburst Technology Easy Sheet Template
.EZX WHAP File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.F Compressed Archive File (UNIX)
FORTRAN Program
Newing-Hall Computer Engraving Software Graphic
.F00 Kanji Font
.F01 Perfect Fax Document
.F06 DOS 6 Pixel Screen Font
.F07 DOS 7 Pixel Screen Font
.F08 DOS 8 Pixel Screen Font
.F09 DOS 9 pixel Screen Font
.F10 DOS 10 Pixel Screen Font
.F11 DOS 11 Pixel Screen Font
.F12 DOS 12 Pixel Screen Font
.F13 DOS 13 Pixel Screen Font
.F14 DOS 14 Pixel Screen Font
.F15 DOS 15 Pixel Screen Font
.F16 DOS 16 Pixel Screen Font
.F2 FLASH BIOS File
.F2F File to File (encryption)
.F2R Farandoyle Linear Module Format
.F3 FLASH BIOS File
.F3R Farandoyle Blocked Module Format
.F32 Raw 32-bit IEEE Floating Point Values
.F64 Raw 64-bit IEEE Floating Point Values
.F77 FORTRAN 77 Program
.F90 FORTRAN Program
.F96 Frecom FAX96 Document
.FA EROSION 3D Flow Accumulation [Format (pdf)]
.FA1 DATAIR FAS 87/132 Reporter Data File
.FA2 DATAIR FAS 87/132 Reporter Custom text File
.FAC Usenix FaceServer Graphic [XnView]
.FACE Usenix FaceServer Graphic [XnView]
.FAM Maxis File (unverified)
The Sims Family File
FamicomS Nintendo Entertainment System Emulator ROM Image
.FAQ Frequently Asked Questions
.FAQT FAQTool XML Contents File
.FAR Farandoyle Tracker Music Module
The Sims (Maxis) Archive File [Dragon UnPACKer]
.FAS 3D Fassade Plus Basic Module
.FAV MS Outlook Bar Shortcuts [Buy Office XP at Shop.Microsoft]
.FAX Fax File (various - often TIFF format) [XnView]
.FB5 FlowBiz Integrator File (Procedure documentation)
.FBC FamilyTree Compressed Backup File
.FBD F-22 Lightning Advanced Gravis Joystick Control File
Remedy Change Management Flashboard
DART Pro 98 User-definied Complex Restoration Filters
The Quarterback Pro Coverage Worksheet
Honeywell Control Builder File (UMC800 Controllers)
.FBK Navison Financials Backup
FamilyTree Backup File
.FBM Fuzzy Bitmap [XnView]
.FBN ArcView Spatial Index File For Read-Only Datasets
.FBS File Burner Skin
.FBX 3D Data Exchange Format
ArcView Spatial Index File For Read-Only Datasets
.FC Harvard Dictionary (Harvard Graphics taken over by Serif)
.FC2 Curious Labs Poser Face File
.FCB Forest Cover Attribute Processing File
FAAST Builder File
.FCD Virtual CD-ROM
FastCAD/EasyCAD Output
Patton & Patton Flow Charting 3 File
IsoBuster File
.FCF SHELXL93 File (created by LIST 4 command) [contains: h,k,l,Fc^2,Fo^2,sigma(Fo^2)]
Altera MAX+PLUS II File
.FCG Mystic Photo Format
.FCI EROSION 3D Inflow Table [Format (pdf)]
.FCM Forward Compression Binary File Patch
Fluke Networks CableManager File
.FCP FLAMES Checkpoint Restart File
.FCS Flow Cytometry Standard Format
Fantasy Football League Organizer File
RealProducer Pro Settings
c-tree Server/Plus Data File
Canon Zoom Browser EX File
CD Trustee File
Spectrum Server Log File
.FCT Foxpro Catalog
Campaign Cartographer 2 File
.FCW Campaign Cartographer 2 File
FastCAD File [Viewer]
.FD FORTRAN Declarations [FORTRAN]
Dataflex Field Compiler Offsets
.FDB Navison Financials Database
Legacy Family Tree Database
Art Explosion Portfolio Catalog File
.FDF Adobe Acrobat Forms Document
Format Definition File (used by PC connectivity packages uploading to midrange systems)
.FDI Amiga Disk File (using WinUAE 0.8.17 emulation software) (see ADF) [Amiga Forever]
.FDL XYRO Active Distribution Console File Distribution List
.FDM Floppy Disk Manager File [Software?]
.FDR Final Draft Document File
Embroidery Design File [possibly read with Melco Sizer Software]
.FDW F3 Design and Mapping Document Form
.FDX Force Index
.FEB WordPerfect Figure Editor Button Bar
.FEC U.S. Federal Campaign Expense Submission File [Also FILPAC]
Ferite Programming Language File (http://www.ferite.org is listed but non working)
.FEM CADRE Finite Element Mesh File
.FEP MS WEFT Embedding Project
.FEX Focus File
.FF AGFA CompuGraphics Outline Font Description
Sigmac Source File
.FFA MS Fast Find File
.FFF GUS PnP Bank
defFax Fax Document
Maggi Hairstyles & Cosmetics [XnView]
.FFL MS Fast Find File
PrintMaster Gold Image File
Alien vs Predator Archive [Dragon UnPACKer]
.FFO MS Fast Find File
.FFT DCA/FFT Final Form Text
MS Fast Find File
.FFX MS Fast Find File
.FGA Folder Guard Attributes
.FGD Folder Guard Data
Half-life Modification Map Configuration File (also see .BSP)
Digital Raster Graphic Metadata File
.FGP Folder Guard Passwords File
.FH3 Aldus Freehand 3 Drawing
.FH4 Aldus Freehand 4 Drawing
.FH5 Freehand 5
.FH6 Freehand 6
.FH7 Freehand 7
.FH8 Macromedia Freehand 8
.FH9 Macromedia Freehand 9
.FH10 Macromedia Freehand 10 [Tech note]
.FI FORTRAN Interface File [FORTRAN]
Flash Image [XnView]
.FIC Windev Database System
.FID Bruker Aspect NMR Data File
.FIF Fractal Image Format
FIF (Iterated System) [XnView]
SpinRite Hard Disk Fingerprint File
.FIG REND386/AVRIL Graphic
Super Nintendo Game-console ROM Image [See ZNES or SNES9x]
XFIG Graphic File (vector graphics)
.FIL dBase Files List Object
WordPerfect Overlay
Application Generator File Template
ACL For Windows Data File (data mining software)
Cardbox Database
File List (various)
.FIM Construsyc/Instasyc File
.FIN WordPerfect Print Format Text
Perfect Writer Print Formatted Text
ATI Radeon Video Driver File
.FIO ULead Viewer Support File
.FIP FingerPost Information Processor File (REMOTE.FIP is parameter file)
.FIRE FireStarter Project File
.FISH 3d Fish Tank Saved Fish
.FISHES 3d Fish Tank Saved Fishes
.FISHTANK 3d Fish Tank Saved Fishtank
.FIT FITS Graphic (Flexible Image Transport System) [XnView]
MS Windows NT File Index Table
.FITS FITS Graphic (Flexible Image Transport System) [XnView]
.FIX Generic Patch File
.FKY Foxpro Macro
.FLA Macromedia Flash Movie Authoring File
.FLASK FlasKMPEG Language Definition File (ASCII text file)
.FLB Papyrus Format Library
VersaPro Folder Backup
MicroSim PCBoard Footprint Library File
.FLC AutoDesk FLIC Animated Picture [XnView]
FLIC Video (may be same as above)
.FLD Charisma Folder
Hijaak Thumbnail Folder
WinFlash Educator Flashcard Options/Statistics File
VersaPro Folder Contents
3D Fassade Plus Field Define Module File
.FLEX Flexi Data Smoothing (Contact for program)
.FLF Corel Paradox Form
OS/2 Driver File
Navison Financials License File
Firehand Lightning Graphic Collection
.FLG MicroSim PCBoard Log Of Forward Engineering Change Orders Applied To The Layout
.FLH FLIC Animation (DTA)
.FLI Autodesk FLIC Animation [XnView]
EmTeX Font Library
.FLL Foxpro Library
The Sims Floor File
.FLM AutoCAD Film
Medi@Show File
"RealPixel" Animation File (various)
.FLO MicroGrafx FlowCharter File
.FLOOR Structural Concrete Software Floor Data File
.FLP Fruityloops Saved File
Floppy Disk Image File (use FDIMAGE.EXE to place on a diskette)
.FLR Live3D File
The Sims (Maxis) Floor Texture File
.FLS Farrukh Imposition Purlisher Filelist Document
WinFlash Educator Flashcard Source File
ArcView Windows Help Supporting File
.FLT Corel Graphic Filter
StarTrekker Music Module
MulitGen Open Flight File
WinFlash Educator Flashcard Compiled Test File
OS/2 Warp Filter Device Driver
Asymetrix Graphics Filter Support File
Micrografx Picture Publisher Filter
FLIC Animation (DTA)
MS Graphics Filter
FileMaker Filter
CoolEdit Pro Filter [PAF filter]
.FLX FLIC Animation (Tempra Pro, Mathematica, U-Lead, 3DStudio MAX)
Dataflex Ordered Binder
DataFlex Compiled Binary File
.FLZ Medi@Show Data File
WinFlash Educator Flashcard Compiled Study File
.FM Adobe FrameMaker Document
FileMaker Pro Spreadsheet
.FM1 Lotus Spreadsheet File
.FM3 Harvard Device Driver (Harvard Graphics taken over by Serif)
1-2-3 Format File
FileMaker 3 Database Document
.FMB WordPerfect File Manager Button Bar
Oracle Binary Form Source Code
.FMC NCAD File (woodworking CAD program)
Embroidery Design File [possibly read with Melco Sizer Software]
.FMD Open Access File
.FMF IBM LinkWay Font or Icon
.FMG FreeMarkets® Graphics Browser (ActiveX Viewer)
.FMGEN FlexiMusic Generator
.FMK PowerStation FORTRAN Make File [FORTRAN]
.FML GetRight File Mirror List
Oracle Mirror List
.FMMUS FlexiMusic Producer
.FMO dBase Ordered Format
.FMORC FlexiMusic Orchestra
.FMP FileMaker Pro Document
.FMT Format File
Style Sheet
Oracle Text Form Format
dBASE IV Format File
MS Schedule+ Print File
MS Visual FoxPro Csreen Format File
Cardbox Format File (database program)
Ox Object-Oriented Matrix Programming Language Gauss Matrix File
.FMV Frame Vector Metafile
.FMX Oracle Executable Form
.FMZ Form*Z Project File
.FMZIP FlexiMusic Zipper
.FN3 Harvard Graphics Font (Harvard Graphics taken over by Serif)
.FND MS Explorer Saved Search
.FNG Font Navigator Group File
.FNK FunkTracker Module
.FNO Folio Infobase [May be mistype of .NFO]
.FNP FlashNpack (convert Flash Movies) [product in beta as of Feb 2002]
.FNT Font File (Windows 3.1)
.FNX Exact Inactive Font
.FO1 Borland Turbo C Font
.FO2 Borland Turbo C Font
.FOB Navision Attain Object File
.FOC FOCUS/WebFOCUS Database File
.FOG Fontographer Font
Computer Generated Forces for Action Fog Defaults
.FOL 1st Reader Saved Message Folder
.FOLDER Mail Folder
.FON Font File
Telix Dialing Directory
Procomm Plus Call Log
.FOO Kai's SuperGoo Fusion
.FOR FORTRAN Source [FORTRAN]
WindowBase Form
.FOT Installed TrueType Font
.FOUR VAX CRYSTALS Chemical Crystallogaphy File
.FOW Family Origins File (Genealogy)
.FOX FoxBase File
.FP FileMaker Pro File
FoxPro Configuration Info
GoldMine Business Contact Manager Report
CRiSP Harvest File
.FP1 Flying Pigs for Windows Data
.FP3 FileMaker Pro File
Imsi FloorPlan 3D
.FP5 FileMaker Database Design Report Template
.FPA Franklin Potter Associates Business Invoice Designer
.FPB FLAMES Playback File
.FPC FoxPro Catalog File
.FPD MicroSim PCBoard External ASCII Footprint Definition File (used for import and export)
.FPF Canadian Flight Wizard (flight planning software)
.FPG DIV Game Studio Multi Map [XnView]
.FPK JetForm FormFlow File (JetForm now Accelio)
.FPR FLAMES Prototype File
MicroSim PCBoard Footprint Statistics Report
.FPS Operation Flashpoint Game File
.FPT FileMaker Pro File
FoxPro Memo Fields
.FPW FloorPlan Plus Floorplan Drawing
.FPX FlashPix Bitmap
.FQF FlashFXP Queue File
.FQY FLAMES (FLARE) Command File
.FR3 dBase IV Renamed dBaseIII+ Form
.FRA FrameViewer File
.FRC FLAMES RECORD Output File / FLARE Input File
.FRE Creative Digital Blaster Digital VCR File
Male Normal CT [XnView]
.FRF FontMonger Font
.FRG dBase IV Uncompiled Report
.FRL FormFlow File
.FRM Form File
FrameMaker Document
FrameBuilder Document
Oracle Executable Form
Visual Basic Form
dBASE IV Report File (and others)
WordPerfect Merge Form
DataCAD Symbol Report File
Megalux Frame [XnView]
MYOB Form File
.FRO dBase IV Compiled Report
FormFlow File (and possibly other form programs)
.FRP PerForm Pro Plus Form
FaxRush Packages (listing of fax files - now .ZPK)
.FRS WordPerfect Graphics Driver
.FRT FoxPro Report File
.FRX Visual Basic Binary Form File
FoxPro Report File
.FRZ FormFlow File
.FS NetBSD File (usually BOOT.FS)
PDT Feature Structure File
FormSaver File
FlexiSIGN File
.FSC Campaign Cartographer 2 File
FLAMES Scenario File
.FSF Convert It! Factor File
fPrint Audit Tool File
.FSH EA Sports Game Graphic Editor File
.FSI FileSplit
.FSL Borland's Paradox 7 Forms
Corel Paradox Saved Form
.FSM Farandoyle Sample Format
.FSR File Substring Replacement Utility
.FSS Iomega Backup File Selection Set
.FST FastStats Analyzer File
dbFast Linkable Program
FruityLoops Channel State File (replaced .404 in ver 2.5.0)
.FSX Lotus 1-2-3 Data
FormSaver Fields
.FSY PhotoFantasy Image [XnView]
FileSync (file/folder synchronisation utility)
.FT Lotus Notes Full Text Index
.FTB Roots3 Index File
.FTG Windows Help Full-text Search Group File
ArcView UNIX Help Supporting File
.FTM Family File
MicroGrafx Font
.FTP FTP Configuration Information
.FTS Windows Help Full-Text Search Index File
Flexible Image Transport System [XnView]
ArcView UNIX Help Supporting File
.FTV Forest & Trees File
.FTW Family File
FontTwister File (text effect generator)
.FU F* You Software Key Generator (Software protection breaker)
.FUL Full Foram Count File
.FUN Koolmoves File (Flash tool)
.FUZZY Fuzzy Logic File
.FVF Fluke View
.FVML formVista (web application development environment) - Product in alpha Jul 2002
.FVPL Frozen Vertex Pair List File
.FVS Forest Vegetation Simulator Tree Data File
.FVT Interlock Public Computer Utility
.FW Framework Database
.FW2 Framework II File
.FW3 Framework III File
.FW4 Framework IV File
.FWB FileWrangler Data File Backup
.FWL FileWrangler EXE Library
.FWS FileWrangler Data File for File Splitting Configuration
.FX FastLynx On-Line Guide
.FXD WinFax Sent Document (TIFF format)
FAXit Phonebook
.FXI File-Ex File
.FXM WinFax & WinFax MiniViewer Fax
BigFix
.FXO Fax Image Document [Open with Quick view Plus]
.FXP FoxPro Compiled Source
.FXR WinFax Received Document (TIFF format)
.FXS WinFax Fax Transmit Graphic
.FXT Finale Music Notation Software Plug-in
.FYI Flow-Cal File (natural gas operations)
.FZB Casio FZ-1 Bank Dump
.FZF Casio FZ-1 Full Dump
FontZip Font Packer
.FZV Casio FZ-1 Voice Dump
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.G Applause Data Chart
Cliq Accessories Datebook Schedule Group [Linux Suite PDF Description]
.G?? MicroSim PCBoard Photoplot Artwork File (?? is the page number within the job)
.G3 G3 FAX File [XnView]
.G32 GFA BASIC 32 Program File
PaperPort File
.G3D GenDesigner 3.x Genealogy Database
.G3F Zetafax TIFF File (fine resolution)
.G3N Zetafax TIFF File (normal resolution) [XnView]
.G4 GTX RasterCAD File
Access [XnView]
.G42 ADAPTA DLS/32 Supply Chain Planning (ASCII file with info about SKUs and product-groups)
.G53 ADAPTA DLS/32 Supply Chain Planning (ASCII file with info about Bills of Material)
.G8 PicLab Plane Three Graphics
.GAC Global Audio Control Skin
.GAF Total Annihilation [XnView]
.GAL Gallery of Pictures
Corel Multimedia Manager Album
.GAM GammaFax Fax Document
TADS 2.x Game File
Baldur's Gate Game File
The Games Factory, Multimedia Fusion, Click and Create Game File
All Looking Glass Studio Dark Engine Games [Fan Site - LGS no longer in business] (Dark object hierarchy)
Animated E-mail (unverified)
.GAP Electrical Generation Analysis and Planification
.GAT Gator File (password manager)
.GAU Gaussian Input File (MIME type chemical/x-gaussian-input)
MS Flight Simulator Gauge (e.g., altimiter.gau)
.GAY Reported as Sometimes a Porn File (presumably a renamed standard graphic file)
.GB Chinese
Nintendo GameBoy Emulator ROM Image File
Printfox/Pagefox [XnView]
.GBA Nintendo® Game Boy Advance ROM Image
GrabIt Batch Files
.GBC Nintendo® GameBoy Color Emulator ROM Image File
.GBD Gator Banner File
.GBK Interbase Database Backup
.GBL VAXTPU Global Definitions (VAXTPU is default OpenVMS editor)
.GBR GIMP Brush File [GIMP] [XnView]
Gerber Format File (Graphics Language for the Electronics Industry) [Viewer]
.GBS Gameshark Online Save/Snapshot
.GBT Photoshop File
.GC Sierra Print Artist Greeting Card
.GC1 Golden Common Lisp Source Code
.GC3 Golden Common Lisp Source Code
.GCA GOCA Graphics File
G Compression Archiver Compressed File (link is Japanese site) [Mime Type application/x-gca-compressed]
.GCC VISUAL EPR COSEUL.EXE Result (table of components of Cartesian tensors)
.GCD Generic CADD Drawing
IsoBuster File
Prassi CD Image
GNUe Class Definition
.GCF WinXComp Grouped Compressed File
.GCI GTA2 Game File
VISUAL EPR COSEUL.EXE Result (table of components of irreducible tensors)
.GCM GeoConcept Map File
Group Mail CMessage Store File
.GCP Ground Control Point File (map projection)
.GCR VISUAL EPR COSEUL.EXE Output
.GCT ApplinX Screen Scrapper (unverified)
.GDB Interbase Database
Group Mail File
.GDF GEOS Dictionary
.GDG ReliaSoft RG (Reliability Growth Analysis Software)
.GDM Bells, Whistles, and Sound Boards Module
.GDR SymbianOS Bitmap Font File (can contain multiple typefaces)
.GDS Image File
Chip Layout Information
.GED GEDCOM Family History File
EnerGraphics File
Graphic Environment Document
Arts & Letters Graphics File
.GEM GEM (a desktop interface) File
Digital Research GEM Paint [XnView]
Ventura Publisher Vector Graphics
.GEN Ventura-Generated Text File
Chromeleon Generic Driver Configuration
dBase Application Generator Compiled Template
ArcView ARC/INFO UnGenerate Format
.GEO VideoScope File
GeoSoft Compressed Add-on
Geoworks Geode
GeoPaint [XnView]
Trumpf ToPs File (CAD/CAM, laser cutting)
.GER GerberView File (partial support for extended Gerber [RS-274X] file format)
.GETRIGHT GetRight Download in Progress
.GF gFx UNIX Plotting Program
METAFONT Generic Font File
Geometric Data
Pilot Logbook for Grok File
Starfleet Command - Empires At War File
.GFA Bitmap Graphics File (see .GFX/Warcraft; files are similar)
.GFB GIFBlast Compressed GIF Image
.GFC Patton & Patton Flowcharting 4 File
.GFD Menus for GNUe Forms
VISUAL EPR Energy, Fields File
.GFI Genigraphics Graphics Link Presentation
.GFT NeoPaint Font
.GFW ArcView World File For GIF Image
.GFX Genigraphics Graphics Link Presentation
WarCraft II Image File
.GFY Grafical 1.0 File
.GG Sigmac Compiled Machine Code
Gridgen File
Sega GameGear Game ROM Image
Koala Paint Compressed File [XnView]
.GG1 Goofy Golf Deluxe Course
.GG2 Goofy Golf Deluxe Saved Game
.GGI GGI Extension
.GGP GemCom Graphic Format
.GGS Gameboy Emulator File [No$gmb]
.GHO Symantec Ghost Disk Image File
.GHS Lasertank High Scores
Symantec Ghost Disk Image Span File (only used if disc is over 2GB - see .GHO)
.GI Sony CD Extreme Global Image File
.GIB Graph-in-the-Box Chart
.GID Windows Help Index File
.GIF Graphic Interchange Format [XnView]
.GIFF Graphic Interchange Format [XnView]
.GIG Sound File
.GIM Genigraphics Graphics Link Presentation
.GIW Graph-in-the-Box Presentation
.GIX Genigraphics Graphics Link Presentation
.GJD 7th Guest Game Archive
11th Hour Game Archive [Dragon UnPACKer]
GetJet Professional Database (really an Access database)
.GJF Gaussian Input Data File
.GKH Ensoniq EPS Family Disk Image
.GKS Gravis GripKey Document
.GL GRASP - Graphical System for Presentation File
.GLD Glide File
.GLG MicroSim PCBoard Photoplot Job Description File (companion to the .g?? files)
.GLM Glim Data File
.GLY MS Word Glossary [Buy Office XP at Shop.Microsoft]
.GM Autologic [XnView]
.GM2 Autologic [XnView]
.GM4 Autologic [XnView]
.GM? Heroes of Might & Magic III Saved Game (? = number of human players in game)
.GMAX gmax Game Creator
.GMD Game Maker Stored Game (game under development--also see .GMR)
.GME Interact DexDrive Playstation Memory Card Save
.GMF Applause CGM Graphics
.GMM Group Mail Message Log File
.GMP GTA2 Game File
Group Mail List Information File
Geomorph Tile Map
.GMR Schlafhorst Automation Graphical Monitor Record
Game Maker Compiled Game (finished game--also see .GMD)
.GMS Corel Global Macro File
.GMT Scarlett Expert System Compiler Grammar File (Scarlett is not presently available)
.GMX Group Mail Message File
.GNA Genigraphics Graphics Link Presentation
.GNO Genopro Genealogy Document File
.GNT Micro Focus Generated Code
.GNUMERIC Gnumeric Default XML-based File (replacement for proprietary spreadsheets)
.GNX Genigraphics Graphics Link Presentation
.GOB Dark Forces Game File [Dragon UnPACKer]
Indiana Jones 3D Archive [Dragon UnPACKer]
.GOC Geoworks Goc Source Code
.GOH Geoworks Goc Header
.GOO Kai's Power Goo / Kai's Supergoo
.GOR Gorilla (Film & Video Production Management)
.GP Geoworks Glue Geode Parameter File
.GP3 CCITT Group 3 File (fax)
GuitarPro 3
.GP4 CCITT Group 4 File (fax)
.GPD VISUAL EPR Input Data for PARAMS.EXE
.GPF Believed to be a Japanese graphic file
.GPG GnuPG Encrypted File (usually compatible with .PGP files)
.GPH Lotus 1-2-3 Graph
Stata Graph
.GPK Omnigo Program Package [Added Info]
.GPL GPS Log File (used by mapping software)
.GPP GraphPap Graph Paper File
Serif GraphicsPlus Object
.GPR VISUAL EPR PARAMS.EXE Results
.GPS Pocket CoPilot GPS Tracks Data File
.GPX BASIS File
.GQA BI/Query Data Model Admin Layer
.GQL BI/Query Data Model (used to be Andyne GQL)
.GQU BI/Query Data Model User Layer
.GR XGMML (eXtensible Graph Markup and Modeling Language) File
.GR2 Windows 3.0 Screen Driver
.GR3 Windows 3.0 Screen Grabber
.GRA Flight Simulator File
MS Graph Chart
SigmaPlot Data File
STN Express Transcript Graphics File (search science databases through STN®)
.GRAAL Offical Graal Level
.GRB MS-DOS Shell Monitor
.GRD Gradebook Power File
Map Projection Grid File
.GREY Picture File (raw GREY graphics) RAW RGB 24-bit Graphic [XnView]
.GRF Graph
Graph Plus Graph File
Golden Software Graph File
Grafix Idea File
Graph Edit File [Part of DirectX SDK]
DLG "Graphic" Format
.GRL Matlab Graphic Format
.GRM VISUAL EPR Input Data for FIntGraf
.GRN Granny 3D Rendering Program
.GRO Serious Sam Game File [Dragon UnPACKer]
Warlords Battlecry Archive [Dragon UnPACKer]
HP-48/49 GROB [XnView]
.GRB HP-48/49 GROB [XnView]
.GRP Windows Program Manager Group
PixBase Pictures Group
Duke Nukem 3D Archive [Dragon UnPACKer]
Shadow Warrior Archive [Dragon UnPACKer]
.GRQ Quickstep Barco Graphics
.GRS Packedge Barco Graphics
.GRT VISUAL EPR Calculation Results of Fields
.GRV Groove Networks File
.GRX GetRight File List
.GRY Picture File (raw GREY graphics) RAW RGB 24-bit Graphic [XnView]
.GS1 GraphShow Presentation
.GSC GeneStudio File (Molecular Biology Software)
.GSD Professional Draw Vector Graphics
.GSM Raw GSM 6.10 Audio Stream (Global System for Mobile Audio)
Sound File [Linux Player]
US Robotics Modem File
.GSP Geometer's Sketchpad Material File
.GST MapInfo Geoset File
.GSW GraphShow Worksheet
.GSX Gens 2.0 Save State File (Sega Genesis/Megadrive/32X Emulator)
.GT2 Graoumftracker Music Module (new)
.GTK Graoumftracker Music Module (old)
.GTP GuitarPro File
MultiFS Video File
.GTS Genome Software Tempo Alarm Clock
.GTY Gibson Tray File
.GUP PopMail Data
.GUR Gutsch & Exner Software Update Undo
.GUX Gutsch & Exner Software Update
.GV Grandview (DOS-based outline program by John Friend who licensed to Living Videotext; bought by Symantec)
.GWI Groupwise File (binary file that contains link information)
.GWK GraphiCode Printed Circuit Board Drawing [Use GC Prevue to view]
.GWP Greetings WorkShop File [Now MS Picture It!]
.GWS GeoMedia Geoworkspace File
.GWX Genigraphics Graphics Link Presentation
.GWZ Genigraphics Graphics Link Presentation
.GX1 Show Partner Graphics File
.GX2 Show Partner Graphics File
.GXC General CADD Pro File
.GXD General CADD Pro File
GX-Reports File
Jeol EX Spectrometer Data File
.GXF General CADD Pro File
.GXL Genus Graphics Library
.GXM General CADD Pro File
.GXP Jeol EX Spectrometer Data File
.GXR Genexus Report Viewer
GX-Reports File
.GXT GTA2 Game File
.GYM Sega Genesis Music Logged Format
.GZ Gzip Compressed Archive
.GZIP Gzip Compressed Archive (more usually seen as .GZ)
[Note: GZIP used on a single file will often produce a compressed file with
the last letter of the original extension replaced with the letter Z;
e.g., gzip 1d66.pdb will likely produce 1d66.pdz.]
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.H Header (Usually C Compiler)
.H1 Bruker Aspect NMR Data File
.H3M Game Map File (used by a large number of games)
.H4R Possible Container for .MP3 Files (MUSIC.H4R)
.H! Flambeaux Tutorial Database
.H++ C++ Header File
.H-- Sphinx C-- Header File
.HA Compressed Archive
.HAD MixlleniumEngine (Haydee) Web Server Module Style File (XML format)
.HAK GameHack File (instruction codes to apply to memory to hack a game)
Neverwinter Nights File
.HAL Mortyr Archive [Dragon UnPACKer]
.HAM Image File
.HAN Viewpoint Headline Studio (Viewpoint used to be MetaCreations)
.HAP Compressed Archive
.HAT HAT (HOORA Analysis Tool) Model
.HAY MixlleniumEngine (Haydee) Web Server Module Content File (XML format)
.HBC Home Buyers Calculator Suite
.HBK Mathcad Handbook
Humanic Software Accounting Data
.HC BI/Suite Hypercube
.HCM IBM HCM Configuration
.HCR IBM HCD/HCM Production Configuration
Half-fold Card File (Printmaster and others)
.HCT Symantec Anti-Virus Live Update File (usually LIVEUPDT.HCT)
.HD2 Curious Labs Poser Hand File
.HDA HotDocs Document
.HDB Nero File (CD burning/design software)
.HDF Hierarchical Data Format File
Help Development Kit Help File
.HDL Procomm Plus Alternate Download File Listing
.HDML Handheld Markup Language File (WAP phones; browser prior to 4.X)
.HDP Magix Music/Video
.HDR Procomm Plus Message Header
PC-File+ Database Header
Egret Data File
ArcInfo Binary [XnView]
Adobe Photoshop File
MicroSim PCBoard Hole-Drill Schedule Report
Apollo HDRU [XnView]
ArcView Header File (for ArcView extensions or TIF images)
.HDRU Apollo HDRU [XnView]
.HDW Harvard Draw Vector Graphics
.HDX Help Index (Various)
.HED HighEdit Document
Hi-Eddi [XnView]
ReliaSoft RG (Reliability Growth Analysis Software)
.HEH Scarlett Expert System Compiler Facts File (Scarlett is not presently available)
.HEL MS Hellbender Saved Game
.HEX Hex Dump
Macintosh BinHex 2.0 File
.HF HF File [XnView]
.HFI HP Font Info
.HFS Macintosh Disk Image on CD [FAQ]
.HFV Simulated Macintosh Volumes on PC Hard Drive [Executor] [HFVExplorer]
.HFX HotFax File
US Robotics Rapid Comm Voice Data File
.HFZ Pinnacle Studio Video Editing File
.HGH Star Wars - Tie Fighter High Score
.HGL HP Graphics Language (plotter) [SwiftView]
.HGS HighGrow Virtual Seed File
.HH C++ Header
Help Topic Map File
HammerHead Drumloop File
.HHC Table of Contents File (HHW Application)
TurboTax Contents File
.HHH Power C Precompiled Header
.HHK Help Workshop Index File
.HHP Procomm Plus Help Data
.HHP HTML Help Project
.HI Spy-CD CD Search Index File
.HI1 Spy-CD CD Search Database File
.HI2 Spy-CD CD Search Database File
.HI4 Spy-CD CD Search Database File
.HIA Spy-CD CD Search Database File
.HIB Spy-CD CD Search Database File
.HIC Spy-CD CD Search Database File
.HIH Spy-CD CD Search Database File
.HIM Spy-CD CD Search Database File
.HIN HyperChem Molecule
Spy-CD CD Search Database File
.HIP Spy-CD CD Search Database File
.HIQ Spy-CD CD Search Database File
.HIR C64 Hires [XnView]
.HIS Spy-CD CD Search Database File
.HIT HitPlayer Audio File
Nonags Dialog Killer Data File
The Sims (Maxis) Sound File
.HIW Spy-CD CD Search Database File
.HIZ Spy-CD CD Search Database File
.HJT TreePad Hypertext Database File
.HLB VAX Help Library
.HLN Microstation Hidden Line File (unverified)
.HLP Windows Help File
Stata Statistical Software Help File [Text files whose format predates Windows]
.HLX Visual C++ Syntax Coloring Instructions
ATI Radeon Video Driver Support File
Hyperlatex File
Multi-Edit Help File
.HLZ Multi-Edit Packed Help File
.HM2 Help & Manual Help File Project
.HM3 Help & Manual Help File Project (ver 3)
.HMI Descent Human Machine Interfaces MIDI File
.HMM Procomm Plus Alternate Mail Read Option Menu
.HMP Descent Human Machine Interfaces MIDI File
.HMS Stentura 8000 or Stentura 8000LX Deposition File (court record)
MS SMS Inventory File
HMS Archiware File (unverified)
.HMX MixlleniumEngine (Haydee) Web Server Module Template File (XML format)
.HM~ Help&Manual Backup Help File Project
.HNF Humax Receiver Settings
.HNV TheWord & Bible Companion Hebrew Names Version Bible
.HO Magix Music/Video
.HOF Hall Of Fame (scores)
.HOG Lucas Arts Dark Forces WAD File
Descent Mission File [Dragon UnPACKer]
.HOR Horoscope (WINHORO.EXE) (unverified)
.HOT The Sims (Maxis) Sound File
.HP HP Graphics Language (plotter) [SwiftView]
.HP8 HP NewWave Write ASCII Roman8 Character Set
.HPD Harry Potter Related
.HPF PageMaker HP LaserJet Fonts
HotLine Partial Download File
.HPG HP Graphics Language (plotter) [SwiftView]
.HPGL HP Graphics Language (plotter) [SwiftView]
.HPI Gem Font Information
Hemera Photo-Object Image [XnView]
.HPJ Help Project File
.HPK Compressed Archive
.HPL HP Graphics File
.HPM Procomm Plus Alternative Menu
HP NewWave Emm Text
.HPP Borland C++ Builder 6 Program Header
InfoMgr Database File
.HPR RoboHELP Configuration File
.HQX Binhex Text Conversion File (Macintosh)
WinXP Game File (sorry no details were in the submission)
.HR2 Curious Labs Poser Hair File
.HRF Hitachi Raster Format Graphic
.HRL Herolab EasyWin32
.HPM Procomm Plus Alternate Main Menu
.HPP Zortech C++ Header
.HPR RoboHelp Configuration
.HQX Macintosh BinHex 4 Compressed Archive
.HR TRS 80 Graphic [XnView]
.HRM Procomm Plus Alternate Main Menu
.HRU HRU File [XnView]
.HRX Herolab EasyWin32
.HRZ Slow Scan Television [XnView]
.HS Hugs Source Code
.HS2 Postering Monochrome Image
.HSC HelpScribble Project
.HSE Dreamweaver Snippet (pre-MX version)
.HSI Handmade Software Graphic File
.HSK Nimbus 7 SAMS Data File (Daily ASCII files)
.HSM The Sims (Maxis) Sound File
.HSQ Data File Associated with Qaz Trojan
CAST Application Mining Suite (Query file to generate HTML from Database Server)
.HSS Photoshop Hue/Saturation Information
Dreamweaver Snippet (pre-MX version)
.HST History File
Netscape History File
Corel QuickCorrect and Speller History File
Procomm Plus History File
File Associated with WordPerfect (history?)
Symantec Anti-Virus Live Update File (usually LIVEUPDT.HST)
Yahoo Messenger History
Host File
.HT HyperTerminal
.HTA Hypertext Application (run apps from HTML doc)
Hemera Thumbnail Archive
.HTACCESS Apache Access Configuration File
.HTC HTML Component (mechanism for implementing Dynamic HTML in script)
.HTF WebBase File
HTF Sounding File (link is PDF file)
Virtual Hypertext Font (TeX-based) [Basic Info]
.HTI WebBase File
.HTM Hypertext Markup Language (HTML)
.HTML Hypertext Markup Language (HTML)
.HTT Hypertext Template
.HTX Extenended Hypertext Template
Internet Database Connector File
.HULL Halflife Map Collision Hull File
.HUS Husqvarna Designer I Embroidery Machine Format [possibly read with Melco Sizer Software]
.HUY Eto Dlia Vas
.HVD chosenOS HoverNews Skin File
ISIS Hviews File (chemical reaction database)
CMT Surveyor's Assistant 1.x/2.0x Job
HerdView Event Data File
.HWCFG VersaPro Hardware Configuration File
.HWD Hollywood Presentation File
.HWL Hangman Deluxe Word List
.HWP Hangul (Korean) Word Processor File
.HX EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.HXK Help TOC/Index File
.HXM Procomm Plus Alternate Protocol Selection Menu
Descent2 HAM File
.HXS Help 2 File (replacement for .CHM)
.HXT Help TOC/Index File
.HXX C++ Header
.HY1 Ventura Publisher Hyphenation Algorythm
.HY2 Ventura Publisher Hyphenation Algorythm
.HYC WordPerfect Hyphenation File
.HYD WordPerfect Hyphenation Dictionary
.HYP Hypertext File
Hyphenation File
Acrobat Spelling File
Compressed Archive
.HZ Chinese
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.I Progress Include File
Borland C++ Intermediate File
INTERCAL File (INTERCAL=Compiler Language With No Pronounceable Acronym)
.I17 Pixel Power Collage [XnView]
.I18 Pixel Power Collage [XnView]
.I2S Invision for mIRC Settings
.I66 Interactive66 Graphic Design Information
.IAF MS Outlook 97 and 2000 E-mail Account Settings
.IAM Autodesk Inventor CAD File
.IAN Sterling Software COOL Business Team Model File Sterling merged with Computer Associates.
.IAP TeamBG File (modify Infinity Engine games)
.IAX IBM Image Access Executive Bitmap
.IB7 Pixel Power Collage [XnView]
.IBA MDE InfoHandler Infobase File
IBasic Source Code File
.IBD Windows Installer File
.IBF Instant Backup
.IBL IBasic Component Language File
.IBM Electronic Arts Deluxe Paint [XnView]
Archdos Compressed File (IBM internal file)
.IBS i2 iBase File
.IBX Interscope BlackBox File (encryption program)
.IC1 ZyIMAGE Index
.ICA Citrix File
Image Object Content Architecture (IOCA) Graphics File [XnView]
.ICB Targa Bitmap
Image Capture Board [XnView]
.ICC Kodak Printer Image
IronCAD Catalog
.ICD IronCAD 2D CAD File
ASTi Model Builder File
Rate Structure File (BLDRATE.EXE input)
File Associated with Many Games
.ICE Archive File
.ICF ICOM CS-2100 Radio Programming Data
Insane Chat Saved Conversation [ASCII file] (Use care entering this site)
INI Creator for X10 Remote Control
.ICL Icon Library File (various) ImageForge/IconForge Microangelo [XnView]
Clean File (functional programming language)
.ICM Image Color Matching Profile File
ICC Profile, Acer Monotor Drive
.ICN Icon Program
AT&T Graphic Format
RIPTerm Image [XnView]
.ICO Icon ImageForge/IconForge Microangelo
GIMP Icon [GIMP] [XnView]
Sun Icon/Cursor [XnView]
.ICON Sun Icon/Cursor [XnView]
.ICQ ICQ Saved File
.ICS Outlook Calendar File [Buy Office XP at Shop.Microsoft]
SwiftView Command File
IronCAD 3D CAD File
Inovate 3D CAD File
.ICW InterCAD File (Polish site)
.ID Disk Identification File
Lotus Notes ID File
.IDA MS Server File (default.ida is attacked by the Code Red Worm)
.IDB MS Developer Intermediate File
Database Used by Disassembler
.IDC Core IDC [XnView]
.IDD MIDI Instrument Definition
.IDE Integrated Development Environment Configuration File
Sophos Anti-Virus Virus IDEntity File
Borland C++ Project
.IDF MIDI Instruments Drivers File
ARTiSAN Real-time Studio ID File (UML CASE Tool) [See .PKF]
.IDI i-deas Web ACCESS File
.IDIF Netscape Saved Address Book
.IDL MS Visual C++ Interface Definition File
OMG CORBA Interface Definition Language
CRiSP Harvest File
.IDQ Internet Data Query File
.IDT Output of DLL2IDT Utility (used in disassembly)
Text Archive Table (used in software development)
Windows Installer File
.IDV Autodesk Inventor Design View Tree
.IDW Aldus IntelliDraw Vector Graphic
Autodesk Inventor CAD File
.IDX Index (multiple programs)
ArcView Geocoding Index For Read-Only Datasets
.IDY Debug Information File (IMS Database related)
.IDZ i-deas Web ACCESS File
.IEF Image File
.IES Photometric File Data [Illuminating Engineering Society]
.IF9 Pixel Power Collage [XnView]
.IFD Jet Form Design Form
.IFF Graphic, Sound (Interchangeable File Format) [XnView]
The Sims (Maxis) Object/Data File
Sun TAAC Image File [XnView]
.IFL Descent 3 Ship Graphic
.IFM Brighterion iPrevent Fraud Model
Shana Informed Filler (electronically fillable forms)
.IFO DVD Info File (contains menus and other information)
.IFP KnowledgeMan Script
.IFS OS/2 Warp Installable File System
IconForge Image EXE Library
Yuvpak Compressed Fractal Image
.IFW Luminosity Impact! File
.IFX ImageSoft v2.00 Graphic
.IGES IGES-Format [IGES Info]
.IGF Inset Systems Metafile
.IGNORE Likely a text file (e.g., README.IGNORE)
.IGP Igor Reader Sheet Music File
.IGR Intergraph SmartSketch Drawing
.IGS IGES-Format [IGES Info]
.IGX iGrafx Process (graphical process modeling and simulation)
.II C64 Doodle Compressed File [XnView]
.IIF QuickBooks for Windows Interchange File
.III Intel Phone Compatible
.IIM Interscope InstallMaster Setup Project
Inshape Graphic [XnView]
iOpus Internet Macro
.IIMG Interleaf Graphic [XnView]
.IJS J Interpretor Script File (J Language - Mathematical programming language with APL roots)
.IKL MS InkBall (accessory for Windows XP Tablet PC Edition - due end 2002)
.IL Icon Library
MSIL Assembler Input File
.ILB Scream Tracker Data
.ILBM Graphic, Sound (Interchangeable File Format) [may be .IFF file, see above]
.ILK MS ILink Program Format Outline
.ILL Adobe Illustrator Prologue
.ILM Satsang Quiz File
CAS 200 QDA v3.0 Image List Mode File (DNA mapping)
Illuminatus Opus Multimedia File
Iomega Zip Drive Speed Configuration File [Good Info Source]
.ILPLOPTIONS InterLock and PowerLock (public computer management utility)
.ILPLVOUCHERS InterLock and PowerLock (public computer management utility)
.ILS MS Internet Security And Acceleration Server Summary
.ILV ILOG View File
.ILVG iLiving P-to-P (iliving file viewer)
.IM5 Visilog [XnView]
.IM8 Sun Raster Graphic
.IMA WinImage File (Floppy and disk imager)
Mirage Vector Graphics
PIXELA ImageMixer File (Digital image organizer) [Link is Japanese]
.IMB IncrediMail File
.IMC IncrediMail File
.IMD Caseware IDEA (Data Analysis Tool)
.IMF ImageForge/ImageForge Image EXE Library
IncrediMail Letter
.IMG Bitmap Graphic (several programs) [XnView]
AutoCAD CAD-Camera [XnView]
ERDAS IMAGINE Format
Planetary Data System [XnView]
Idrisi32 Raster Image
Radiance Scene Description Image [XnView]
CloneCd Related File
Floppy Image File
Apple Macintosh Disk Copy Format
Microtek Eyestar [XnView]
Sharp GPB [XnView]
Starbase [XnView]
Vicar [XnView]
Vivid Ray-tracer [XnView]
.IMH IncrediMail Data File
.IMI IncrediMail Animation
.IMJ JFIF File With a MS Windows BMP Header (Pegasus Image Corporation)
.IMM IncrediMail Trash
.IMN IncrediMail Notifier
.IMP Urban Chaos Game File
Lotus Improv Spreadsheet
Babya Installer Archive
DVD File
FileMaker Database Translation Filter
WinIMP Archive
.IMQ ImageQ Presentation
.IMR Cognos Impromptu Report Writer
.IMS Incredimail Graphic
.IMT IMNET Image [XnView]
.IMV Yahoo Instant Messenger IMVironment
.IMW Imageware Surfacer 3D CAD Surface Geometry
IncrediMail Sound
.IMY iMelody Ringtone Format (link is PDF file)
.IMZ Compressed Floppy Image
WinImage File (Floppy and disk imager)
.IN$ HP NewWave Install File
.IN3 Harvard Input Device Driver (Harvard Graphics taken over by Serif)
.IN7 Ox Object-Oriented Matrix Programming Language PcGive 7 Data File
.INB Vermont HighText Script
Visual Expert Source Code Documentation
.INC Include File (various)
Internet Connection File (used by ISPs)
.INCD Adobe InCopy/InDesign Link File (Link stories from an InDesign document)
.IND dBase IV or DataPerfect Index
Well of Souls Game File
.INDD Adobe Indesign Document
.INF Information or Setup File (many)
.INFO Amiga Information File [XnView]
.INI Initialization/Configuration File (many)
.INK Pantone Reference File
Mimio Ink File [Electronic Whiteboard]
.INL MS Visual C++ Inline Function File
.INP Oracle Source Code
Self-Extracting Archive Utility Project
GIS Software Text Input File [GIS info]
(ArcView, et.al.) (JShape/FShape)
CHARMM Input File (molecular analysis)
FRANC2D Mesh File
.INS Internet Communication Setting
AdLib Instrument Music File
WordPerfect File
Ensoniq EPS Family Instrument
Sample Cell / II Instrument
InstallShield Script
X-Internet Sign-up File
Inspiration Mind Mapping Software File
1st Reader Install Script
.INSTALL Likely a text file (e.g., README.INSTALL)
.INT Borland Interface Units
Foxpro Code Page
Signature Semi-compiled Program
Unreal Tournament Mutator
Intermediate Code used for syntax checking (various)
.INTER Interspector Project File
.INTERLOCKFAVOURITES InterLock and PowerLock (public computer management utility)
.INTO Interspector Object File
.INU INSPEC Configuration File
.INX Foxbase Index
ACL For Windows Index (data mining software)
.IO Compressed Archive
.IOB Imagine File
TDDD Format 3D Graphic Database
.IOC Instant ORGcharting! Organization Chart
.IOCA Image Object Content Architecture (IOCA) Graphics File [XnView]
.IOF Findit Document
.ION Text Program/Installation Description
4DOS File Description
.IP IconPackager File (changes the look of Windows icons)
.IPD InstallPROG 6 EDBS Install Database
.IPE ItsPersonal File (Personal diary)
.IPF Microsoft SMS Installer Script (with System Management Server 2.0)
.IPG Mindjongg Format [XnView]
.IPH InterPaint Hires Image [XnView]
.IPK NRG iPack File
Sharp Zaurus PDA Application Install File
.IPL Corel Pantone Spot Reference Palette
InstallPROG 6 EDBS File Library
.IPLI IPLab Graphic (I find this as a Macintosh type, but it could be a PC extension)
.IPP Help & Manual Proprietary Image
.IPR IntelliJ Project XML File
.IPS Game Patch File (allows running of illegal copies of some games)
MENSI 3Dipsos (3D pointcloud analysis)
.IPT Autodesk Inventor CAD File
InterPaint Multicolor Image [XnView]
.IPW UniPlot Graph [Free viewer]
.IPX Interactive Pictures Corporation AV File
Viewpoint iPix File
.IPZ ICQ Skin
.IQF Integra 3.0 Query File
.IQY Excel Web Query [Buy Office XP at Shop.Microsoft]
.IRD MS Money Temporary File
.IRIS Silicon Graphics RGB [XnView]
.IRS WordPerfect Resource File
.IRX PS2 Modified Elf Object File
Brewer Lamp Irradiation File
IBM Mainframe Rule File
.ISD RapidFile Dictionary
GraphPad InStat
InstallShield Dialog
dynaSight File
.ISH Compressed Archive File
Image Speeder [XnView]
Image System (HiRes) [XnView]
.ISK Command File (similar to a batch file - view in text editor)
.ISL InstallShield Temporary Installer File
.ISM Image System (Multicolor) [XnView]
.ISO File List for CD-ROM [Fantom CD Emulator]
ISO Buster File
InstallShield Uninstall File
ISO-9660 Table
Easy CD Creator Disc Image
RichWin (Chinese Text Display - Link is to Chinese site)
.ISP Internet Sign-up File
Internet Communication Settings
.ISR MS Streets & Trips Route File
Uninstaller Text File (_deisreg.isr)
.ISS InstallShield Response File
ISS Graphic [XnView]
Caseware IDEA IDEAScript (Data Analysis Tool)
.IST Digitrakker Instrument File (by n-FaCToR)
.ISU InstallShield Uninstall Script
Easy CD Creator 4 Uninstall File
Netscape File
.IT Impulse Tracker Music Module
Intalk Settings
.ITE E-Tabs Reader File
.ITF Inside Tract File
JPI TopSpeed Pascal Interface File
.ITG Intergraph Format [XnView]
.ITH InTether Receiver File (security software)
.ITI Impulse Tracker Instrument
.ITM Infinity Engine Game Item
.ITS Internet Document Set
Impulse Tracker Sample
.ITW Icetips Wizard Editor (partially encrypted ini file)
.IV VRML File
Open Inventor File
.IVF Indeo Video File
.IVP Truevision Targa Bitmap [XnView]
.IVT Beyond 20/20 Table (Multidimensional data viewer)
Concordance Inverted Full Text Database File
.IVX Beyond 20/20 Extract (Multidimensional data viewer)
.IW Iconware Application
Idlewild Screensaver
.IW4 DjVu File [XnView]
.IWA IBM Writing Assistant Text
.IWI Ignite Image Optimiser
.IWC Installwatch Database (install monitor)
.IWP Wang Text File
.IWR i*write 2.0 File
.IWR_BAK i*write 2.0 Backup File
.IX Framemaker Index File
Paperport Search File
.IXA Ulead Image File (video CD image)
.IXC ArcView Geocoding Index For Read-Write Coverages
.IXS ArcView Geocoding Index For Read-Write Shapefiles
.IZD Intrexx Application Export Format (binary)
.IZT Izl Binary Token
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.J Java Source Code
JAR Compressed File
.J2B Jazz Jackrabbit 2 Game Music File
.J2K JPEG-2000 JP2 File [XnView]
.J62 Ricoh Digital Camera File
.J6I Ricoh Digital Camera File
.JAG Jaguar Server File (Atari)
.JAR Java Archive File (a compressed file for applets and related files)
.JAS Compressed Graphic
.JAV Java Source Code
.JAVA JBuilder Java File
.JBC Jam Byte-Code Hex File (8051 Microprocessor File)
BestCrypt File
.JBD SigmaScan Data File
.JBF Paint Shop Pro Browser File [XnView]
.JBG JBIG File [XnView]
.JBIG JBIG File [XnView]
.JBK Juno Backup File
.JBP DJ Jukebox Project
.JBR Jasc Paint Shop Pro Brush
.JBX Project Scheduler File
.JC! FlashGet File
.JD Jigsaw Terminal File (Real-time financial data display)
.JDB Siren Jukebox
.JDE Cariverona
.JDF Turok 2 Game File
.JDT Accelio Capture Classic (JetForm) Filler (JetForm Corp became Accelio 12 Sep 2001)
.JDX EDICT Index (EDICT is Japanese/English Dictionary)
.JEF Janome NH10000 Sewing Machine File
.JET Hybrid JetFax Fax
.JFD FormWare Job
JAWS Voice Synthesis Software
.JFF JPEG Image
.JFI JPEG/JIFF Image [XnView]
.JFIF JPEG/JIFF Image [XnView]
.JFM Accelio Capture Classic (JetForm) File (JetForm Corp became Accelio 12 Sep 2001)
.JFX J2 Fax File
.JG6 BigJig Jigsaw
.JHTML Dynamo Server Page (Java HTML)
.JIF JPEG/JIFF Image [XnView]
Jeff's Image Format [XnView]
.JIS Japanese
.JJ JavaCC File (Java parser generator)
.JLF JetLinks Bookmark Managment
.JLS JPEG-LS File [XnView]
.JMP SAS JMPDiscovery Chart-to-statistics File
.JMS Voxtron TeleButler Graphical Voice Response Call Flow
.JMX JMeter File (Web performance testing)
.JN1 Epic MegaGames Jill of the Jungle Data File
.JNB Sigma Plot Workbook File
.JNG JPEG Network Graphic [XnView]
.JNK Junk (temporary file)
.JNL Ingres Journal File
.JOB Job File
Task Scheduler Task Object
AI Research File
QuestVision Vector Graphics File (IMG File Conversion)
MicroSim PCBoard External ASCII Job File (used for import and export)
.JOBOPTIONS Acrobat Job Options File
.JOD Microsoft.Jet.OLEDB.4.0 Related File
.JOR MS SQL Server Journal File
.JOT WinJottr Desktop Note
JDesignerPro File
.JOU VAX Edt Editor Journal Backup
.JP2 JPEG-2000 JP2 File [XnView] [Kakadu]
.JP3 Electric Quilt File (unverified)
.JP4 Electric Quilt File (unverified)
.JP5 Electric Quilt File (unverified)
.JPC Picture File (Japanese)
JPEG-2000 Code Stream [XnView]
.JPE JPEG/JIFF Image [XnView]
.JPEG JPEG/JIFF Image [XnView]
.JPG JPEG/JIFF Image [XnView]
.JPL Siren Jukebox
.JPS Stereo Image [XnView]
.JPX JBuilder Project File
JPEG-2000 JP2 File [XnView]
.JRP Electric Quilt File (unverified)
.JS JavaScript Source Code
.JSB Henter-Joyce, Inc. Jaws Script Binary File (Screen reader program)
.JSD eFAX Jet Suite Document
Henter-Joyce, Inc. Jaws Script Documentation File (Screen reader program)
Join-Split File
.JSE JScript Encoded Script File
.JSF Macromedia Fireworks Batch Script
.JSH Henter-Joyce, Inc. Jaws Script Header File (Screen reader program)
.JSL PaintShop Pro File
.JSM Henter-Joyce, Inc. Jaws Script Message File (Screen reader program)
.JSP Java Server Page
.JSS Henter-Joyce, Inc. Jaws Script Source File (Screen reader program)
JSheet (Spreadsheet Application Server)
.JSV Java Structure Viewer
HyperRail 3D Coaster Design Screen Shot
Japanese Flash Card File
VXML JavaServer Page
.JSW WML JavaServer Page
.JT JT Fax
.JTD Ichitaro 11 (major Japanese word proccesser)
.JTF JPEG Tagged Interchange Format Image
Hayes JT Fax [XnView]
.JTK Sun Java ToolKit File
.JTP JetForm File
.JVC Digital Camera File
.JW Justwrite Text
Jigsaw Terminal File (Real-time financial data display)
.JWL Justwrite Text File Library
Easy CD Creator's CD Label
.JWP JWP Document (Japanese word processor)
Easy CD Creator Label File
.JZZ Jazz Spreadsheet
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.K Desktop Color Separation Specification Black Layer (usually an EPS file)
.K2 Kar2ouche Storyboard File
.K25 Kurzweil 2500 Sample
Kodak DC25 Digital Camera File [XnView]
.KAP MapInfo Sea Chart
.KAR Karaoke MIDI File
.KAU KeyAudit Software Audit
.KB Borland C++ Keyboard Script
Knowledge Pro Source Code
.KBD Keyboard Script File Layout (various)
(Programs produce these layout files but the operating system actually uses them.)
.KBI Keirsey-Bates Temperament Sorter Index
.KBM Reflection Keyboard Script File Layout
Scala Keyboard Mapping (Musical scale editor)
.KBP Keirsey-Bates Temperament Sorter Profile
.KBR Keirsey-Bates Temperament Sorter Data
.KCL Kyoto Common LISP Source Code
.KCP Keychamp File
.KDC Kodak Photo-Enhancer/Photogen File (raw bitmap image) [XnView]
.KDF Kinkos Photo
.KED KEDIT Profile and Macro File (DOS-based version of IBM XEDIT)
.KEX KEDIT Macro File
.KEY Keyboard Macros
Forecast Pro Datafile
Program Security or Registration File (various)
Sentry 2020 Encryption File
Top Secret Crypto Gold File
DataCAD Icon Toolbar File
Diablo II Key File
ArcView Geocoding Matching Keys (ODB format)
.KF2 Max Payne Model File
.KFA Dark Age of Camelot Animation
.KFS Max Payne Model File
.KFX KoFax Group 4 Image [XnView]
.KGB Kremlin Encrypt File
.KIC Kodak Image Compression File [TIFF Info]
.KIF Autodesk AutoCAD Key Index File
.KIT Raven Toolkit File
.KIX KixTart Script (Win NT login scripts)
.KIZ Kodak Digital Postcard File
.KJV TheWord & Bible Companion King James Version Bible
.KKT TTSKONE (calcualte machinery costs in agriculture)
.KKW RoboHELP Keyword Help project Index File
.KML Emu48 Emulator File
.KMN SIL Hebrew Font System Keyboard
.KMP Korg Trinity KeyMaP File
.KNF Universal Flat Knitting Machine Pattern Design
.KNO Personal Knowbase File
.KOA Koala Paint [XnView]
.KOK DEL MP3 Karaoke
.KOS MicroType Pro Document
.KPF Kapere (download manager, website grabber and more)
.KPG Kai'S Power Goo Graphic
.KPP SmartPad Toolpad
.KPR KPresenter Slide Show
.KPS IBM KIPS Bitmap [XnView]
.KQP Konica Quality Picture (Konica Photo Imaging on-line photo service) [XnView]
.KR1 Kurzweil 2000 Sample (multi-floppy)
.KRX Karaoke MIDI File
.KRY Herolab Krypten
.KRZ Kurzweil 2000 Sample
.KS SOF Game File Log
.KSC Korg Trinity Script
.KSE Keepsake Studio Export File
.KSF Korg Trinity Sample
.KSH Prodigy Internet Registration File
.KST Olivetti Olitext Plus Script File
.KTK Kutoka's Mia (children's education)
.KTT KeyText Data File
.KUMAC Physics Analysis Workstation Macro File
.KVB Klick-N-View Business Cards [Download] (Note: Developer site - http://www.knvs.com/ - did not exist when checked)
.KWD KWord File (Linux Word Processor)
.KWF Kartex (maps and GPS positioning)
.KYB Keyboard Layout
.KYE Kye Game Data
.KYF Visual-Voice Mouth Movement File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.L LEX Program File
Link Instructions
LISP Program File
Cliq Accessories Datebook Lock File [Linux Suite PDF Description]
.LA Lightscape Animation
.LAB Mailing Labels
NCSS Data File
.LAD Daylon Leveller Animation Data
.LAN ERDAS IMAGINE LAN Sensor Data
.LANG CDex Language File (CD/Ripper music encoder)
.LAO EPSON Smart Panel File (unverified)
.LAR Liquid Audio Player Registration File
.LAT Crossword Express Lattice File
.LAV Liquid Audio Player Voucher File
.LAVS Liquid Audio Player Streaming Voucher File
.LAY Applause Word Chart Layout
Lightscape Layer State
Track Builder Simulation Compiler Code (Railroad centralized traffic control simulations)
MiTek Engineering File
Rhino Layer Text File
.LBA Liberty BASIC File
.LBG dBase IV Label Generator
.LBI Dreamweaver Library File
.LBK VersaPro Local Logic Block Backup
.LBL Labels (various)
.LBM Electronic Arts Deluxe Paint [XnView]
XLib Linear Bitmap Graphic
Graphic, Sound (Interchangeable File Format) [may be .IFF file]
.LBO dBase IV Ordered Labels
.LBR Compressed Archive File
Lotus 1-2-3 Display Driver
Omnis7 Application File
.LBS Omnis Studio Application File
.LBT Foxpro Label Memo
.LBX Foxpro Label
.LBXADD Libronix DLS Addin
.LBXALV Logos Bible Software Series X Passage In All Versions
.LBXCBV Logos Bible Software Series X Copy Bible Verses Style
.LBXCIT Libronix DLS Citation Format
.LBXCMP Libronix DLS Company Information
.LBXCOL Libronix DLS Resource Collection
.LBXCTB Libronix DLS Custom Toolbar
.LBXDAT Libronix DLS Data File
.LBXDTP Libronix DLS Data Type
.LBXLBK Libronix DLS License Backup
.LBXLIC Libronix DLS Licenses File
.LBXLLS Libronix DLS Resource (LLS Format)
.LBXNOT Libronix DLS Notes
.LBXOEB Libronix DLS Resource (OEB Format)
.LBXPDF Libronix DLS Resource (PDF Format)
.LBXPLN Logos Bible Software Series X Bible Reading Plan
.LBXPLV Logos Bible Software Series X Parallel Bible Versions
.LBXPRF Libronix DLS Preferences
.LBXRAS Libronix DLS Resource Association
.LBXRTP Libronix DLS Resource Type
.LBXSHL Libronix DLS Shell
.LBXUPD Libronix DLS Update Script
.LBXVRS Logos Bible Software Series X Verse List
.LBXWKS Libronix DLS Workspace
.LBZ Leibniz Mathematical Word Processor
.LCD CDspace CD Emulator
.LCF Linker Control File
.LCH PagePath Technologies LAUNCH! File
.LCK MS Frontpage-related File [Buy Office XP at Shop.Microsoft]
Paradox Lock File
Adobe Pagemaker Database File
.LCL FTP Software Data
.LCN WordPerfect Dictionary File
.LCS ACT! History File
.LCW Lucid 3-D Spreadsheet
.LD Telix Long Distance Codes
.LD1 dBase Overlay File
.LDA LaserData [XnView]
.LDB MS Access Lock File [Buy Office XP at Shop.Microsoft]
TrueVector Log Database
Settler for Windows Temporary File
.LDD Laser Dispatch Data
.LDF LuraDocument File [XnView]
Geoworks Glue Library Definition
MS SQL Server Transaction Log File
.LDL Corel Paradox Delivered Library
OzWin CompuServe E-mail/Forum Access Download Request
.LDR LDraw Model File
.LDS Laser Dispatch Script
Trane Trace Load
.LEG Legacy Graphic Format
.LEN PlatePrep (output on flexo plates)
.LEP Label and Envelope Designer Plus 2000
.LES Learn Lesson File
Mklesson Lesson File
Logitech Entertainment Game Profile
.LET Letter
.LEV Worms Armageddon Map
Worms World Party Map
NetHack Level File
.LEX Lexicon (dictionary file - many)
Lexmark Printer Install File
.LF SoftwareKey License File
.LFA LifeForm File
.LFF LucasFilm Format [XnView]
.LFL LucasFilm Library
.LFM LifeForm File
.LFP LifeForm File
.LFQ LeechFTP Queue File [also see BitBeamer]
.LFT Chiwriter Laser Printer Font
3D Studio Loft File
.LFXM FaceMail Text to Speech E-mail (Site Requires Application Download!)
.LG Logo Procedure Definition
ARchive HANdler by GEorge Lyapko (best for uncompressed 24-bit RGB TIFF images)
.LGC Program Use Log File (for Windows Program Use Optimization)
.LGF legal Eagle Text File
.LGO MS Windows Logo Driver
SuperFax Header/Footer Logo
.LGP Logotron SuperLogo File
.LGT Urban Chaos Game File
The Sims (Maxis) Lighting File
.LHA Compressed Archive File (LZH format; LHA.EXE)
Compressed Archive File (LHARC.EXE)
Compressed Archive File (LHARK.EXE)
.LHS Literate Haskell Source File
.LHW Compressed Amiga Archive File
.LHZ LHA Compressed Archive File
.LIB Program Library (diverse programmers' languages and installers)
Greeting Card Library (e.g., KEY Greeting Card Designer)
Library Used by an Application (e.g., EndNote Library)
Scholar's Aid Library File (backup is .LID file of same name)
.LIC License File (various Shareware)
.LID WinDVD File
Light Field Description File
Dylan Library Interchange Description
LabelVision Auto Incrementing Value File
Maple V Setup File
Scholar's Aid Backup File (backup to .LIB file of same name)
.LIF Compressed Archive File
HP Logical Interchange Format File
Homeworld Texture [XnView]
.LIM Limit Compressed Archive
.LIN AutoCAD Line Art
VAX Program Listing
ArcView ARC/INFO Lineset Symbol File
.LIQ CollegeBAR Bartending Software Liquor Cabinet
.LIS VAX Program Listing
Structured Query Reporting (SQR) Output
.LIT MS Reader EBook File
.LIV LiveMotion SWF Movie (also called Bigshot Movie)
.LIVEREG Symantec Norton Anti-Virus Update Session
.LIVESUBSCRIBE Symantec Norton Anti-Virus Update Catalog
.LIVEUPDATE Symantec Norton Anti-Virus Update File
.LIX Libronix DLS Resource (LLS 2.x Index)
Extend Simulation Library File
.LJ Text File for HP LJ II Printer
.LKO MS Outlook Express Linked Object [Buy Office XP at Shop.Microsoft]
.LKS WinAmp Links File
.LL3 LapLink III Document File
.LLB LabView File
.LLC LapLink Saved Connection File
.LLP VersaPro Local Logic Block
Digital Chart of the World Data File
.LLT Digital Chart of the World Data File
.LLX Laplink Exchange Agent
.LM8 Picture File
.LMD Tune Smithy List of Modes for a Musical Scale
.LML LOGML File (Log Markup Language)
.LMU RPG Maker 2000 (map included in an RPG game)
.LNB Logomanager File
.LND 3D Landscape Data
.LNG Diablo II File
NRG SDR Language File
.LNK Linker File
Windows Shortcut File
.LMP Quake File
.LNS LinkStash Bookmark File
.LOC Suppose Locations File
MicroSim PCBoard Component Locations Report
.LOD Load File (various)
.LOG Log File (many different programs - usually an ASCII text file)
.LOGONXP LogonStudio File (customizes the WindowsXP Logon screen)
.LOK FileWrangler/ZipWrangler/SecurDesk! Encrypted Archive
.LP LP88 Linear Programming for the IBM-PC File
Lightscape Preparation File
FlexRip/B (Print Control and Press Behavior)
.LP3 Hansen Software Label Printer (ver 1.0 - 2.1)
.LP4 Hansen Software Label Printer (ver 3.x)
.LPA LPA-View Laser Particle Analyser Test Analysis Software
.LPB LP88 Linear Programming for the IBM-PC File
.LPC Teko Printer Driver
.LPD Helix Nuts and Bolts File (Helix Software now part of McAfee)
Avery Label Pro
.LPF Lytec's Direct Electronic Medical Claims ClaimsDirect
.LPI Live Pictures
.LPJ PASSOLO Localization Project (Software localization: translation, etc.)
.LPL Darkstone Character Information File
.LPN LVPlan - Planification of Low Voltage Aerial Distribution Networks
.LPU PASSOLO Localization Project (Unicode) (Software localization: translation, etc.)
.LQF Leech FTP Save Queue File
.LQP Liquid Audio Player Passport File
.LQT Winamp File
Liquid Audio Player File
.LRC Intel Video Phone File
.LRF MS C/C++ Linker Response File
.LRM Microsoft Encarta Class Server Learning Resource
.LRP Linux Router Project Package
.LRS WordPerfect Language Resource File
Daylon Leveller Rendition Style (data used for visualizing heightfields)
.LS Lightscape Solution File
Freeware Dictionary Project Data File
.LS1 OzWin CompuServe E-mail/Forum Access Library Listing
.LSA Liquid Audio Player Skin File
.LSC Tune Smithy List of Muscial Scales
.LSD RPG Maker 2000 Saved Game File
.LSE Nokia Audio Manager
.LSF Streaming Audio/Video File
Libronix DLS Resource (LLS 2.x)
.LSG MS LocStudio Glossary
.LSL Corel Paradox Saved Library
Lotus Script Library
Daylon Leveller Shape List (3D geometry for heightfield vector objects)
.LSO Logic Audio File
.LSP LISP Program File
.LSQ VAX CRYSTALS Chemical Crystallogaphy File
CalTech PaleoMag Least Squares Format
.LSR Logos Library System 2.x Standard Reference Definition
.LSS Legato Spreadsheet
.LST Listing or List (e.g., packing list)
PowerPoint File [Buy Office XP at Shop.Microsoft]
Ingres Dump List File
OzWin CompuServe E-mail/Forum Access Library Listing
1st Reader Keyboard Macro
Oracle Spool File
Family Tree Maker Error File
.LSX Streaming Audio/Video Shortcut
.LT PC LTAS Printer Configuration File
.LT2 Curious Labs Poser Lighting File
.LTG Lasertank Bitmap Graphics
.LTH Sierra Print Artist Letterhead
.LTM Lotus Form
.LTR Letter
ACT! (DOS version) Letter File
.LTT SDR99 Speech Recognition Task Lexical TREC Transcription
HP Library and Tape Tools Log File
.LU ThoughtWing Library Unit File
.LUA Lua Source
.LUL OzWin CompuServe E-mail/Forum Access Upload
.LUP OzWin CompuServe E-mail/Forum Access Library Update
.LVL Parallax Miner Descent/D2 Level Extension
Lasertank Level
Max Payne Uncompiled Level File [Added Info]
.LVP Lucent Voice Player (Intuity Audix Multimedia Messaging System)
LView Pro [XnView]
.LVS Daylon Leveller Selection Mask
.LVW Daylon Leveller View File
.LW3 Lightwright File (spreadsheet/database to manage professional lighting design paperwork)
.LWA LightWorks Archive (LWA) Material/Scene File
.LWC Living Word Commentaries Bible File
.LWD LotusWorks Text Document
.LWF LuraWave-compressed Graphic File [XnView]
.LWI LightWorks Image [XnView]
.LWO NewTek Lightwave® Object
.LWP Lotus Wordpro 96/97 File
.LWS NewTek Lightwave® Object Layout
.LWV MS Linguistically Enhanced Sound File
.LX LPEX Customization Command Profile (Programmer's editor iedit.exe or iwzwlx40.exe)
.LXL LPEX File Open Command Profile (Programmer's editor iedit.exe or iwzwlx40.exe)
.LXS LPEX File Save Command Profile (Programmer's editor iedit.exe or iwzwlx40.exe)
.LYR DataCAD Layer File
Song Lyric File [On-line Guitar Archive]
.LYT TurboTax Log File
SignMaking Application Extension
.LYX LyX (WYSIWYM document processor)
.LZD Binary Difference File
.LZH Compressed Archive File (LHARK.EXE)
Compressed Archive File (LHARC.EXE)
.LZS Compressed Archive File
Skyroads Data File
.LZW Compressed Amiga Archive File
.LZX Compressed File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.M Matlab Function
Brief Macro Source
Mathematica File
Limbo Interface Declaration (Inferno OS)
Cliq Accessories Datebook Modification File [Linux Suite PDF Description]
Desktop Color Separation Specification Magenta Layer (usually an EPS file)
.M_U MazeGold Critical File Backup
.M?? Ingres Modify Table/Index File (?? = Hex 00 to FF)
.M$S MindStor Firmware Update File (M$A$W.M$S)
.M11 MASS11 Text File
.M12 Proprietary Data Format for Interchange of Defense Form Data with Mil-Pac Technology Software Products (link is PDF file)
S-BASIC File
Hydrographs Synthesis Project File
SHARP MZ-series Emulator File
.M15 Apple MPEG-1 Video
.M18 Accolade Golf Course File
.M1A Apple MPEG-1/2 Audio
.M1V MPEG-1 Video File
.M2A Apple MPEG-1/2 Audio
.M2P MPEG-2 Program Stream Format File
.M2S MPEG-2 Audio and Video (system stream)
.M2V MPEG-2 Video Only File
.M3 Modula 3 Program File
.M32 Dr.T MIDI File
.M3A MPEG Archive Enhanced .M3U Playlist File
.M3D 3D Animations Macro
Corel Motion 3D Animation
EverQuest File
.M3S Myst III Exile Saved Game
.M3U MP3 Playlist File [WinAmp] [MattBatt iAM-player]
.M4 UNIX M4 Preprocessor File
.M75 Apple MPEG-1 Video
.M8 Heretic II MipMap [XnView]
.MA Maya File (ASCII)
Diablo II Map File
.MA1 SKY Mobile Phone Icon/Ringtone
.MA3 Harvard Macro (Harvard Graphics taken over by Serif)
.MAC MacPaint Bitmap Graphic [XnView]
Macro (various)
.MACP MacPaint Bitmap Graphic [XnView]
.MAD MS Access Module Shortcut [Buy Office XP at Shop.Microsoft]
Game Movie File (unverified)
.MAF MS Access Form Shortcut [Buy Office XP at Shop.Microsoft]
.MAG MPS Magro Paint System Graphic
MS Access Diagram Shortcut [Buy Office XP at Shop.Microsoft]
MAGIchan Graphic [XnView]
.MAI VAX Mail
.MAK Make File (compiler project file)
.MAL AvantGo Connect-compliant Server Configuration File
.MAM MS Access Macro Shortcut [Buy Office XP at Shop.Microsoft]
.MAN Manual (often an ASCII text file)
Windows 2000 Mandatory User Profile (C:/DOCUMENTS AND SETTINGS/USERNAME/NTUSER.MAN)
.MANIFEST MS Visual Stylesheet for Windows Forms (Text file)
.MAP Image
Server-side Image Map (allows one to map link locations in a Web graphic)
Color Palette
AccView Network Map
Atlas MapMaker Map
DIV Game Studio Map [XnView]
Fenix Map [XnView]
Ingres Termcap Mapping File
Poser 3D Map File
WorldCraft Quake/Half-Life Game Level File
Blood Game File Map
Duke Nukem Game Level Data File
...and many more games (too many to list)
Linker Map
Micrografx Picture Publisher Format Data
PROGNOSIS Map Document File
.MAPIMAIL MS Outlook Express Mail File
.MAQ MS Access Query Shortcut [Buy Office XP at Shop.Microsoft]
.MAR MS Access Report Shortcut [Buy Office XP at Shop.Microsoft]
VAX Macro Assembly Program
Bibliographic Data Format (usually .MRC)
.MAS Focus Master Data Definition
MS Access Stored Procedures [Buy Office XP at Shop.Microsoft]
Lotus Freelance Graphics Smartmaster File
QuickCard File
.MAT Sound File
Pro/Engineer Material Properties File
Matlab Variables Binary File
MS Access Table Shortcut [Buy Office XP at Shop.Microsoft]
Autodesk 3D Studio Max and Viz File
Poser 3D Pose File
ArcView Geocoding Matching Parameters File
Ox Object-Oriented Matrix Programming Language Matrix File
CRiSP Harvest File
.MAUD Sound File [Linux Player]
.MAV MS Access View Shortcut [Buy Office XP at Shop.Microsoft]
.MAW MS Access Data Access Page [Buy Office XP at Shop.Microsoft]
.MAX Kinetix's 3D Studio MAX Scene
Autodesk 3ds Max Scene File
Maximizer Contact & E-business Program
Paperport Scanned Image [Viewer]
Max Source Code
OrCAD Layout File
.MAZ Hover Maze Data
Division's dVS/dVISE File
.MB Paradox Memo Holder
Maya Binary (3D Software Maya Scenes)
.MB1 Apogee Monster Bash Data File
.MBD Multimedia Builder MP3 Authoring File
.MBF MS Money Backup File
.MBFS Stardent AVS X Image [XnView]
.MBFAVS Stardent AVS X Image [XnView]
.MBG Mailbag Assistant E-mail Archive
.MBK dBase IV Multiple Index Backup
VersaPro Motion Block Backup
.MBM SymbianOS Multi BitMap Image (native EPOC image format) [XnView]
.MBS Mailbag Assistant Script
.MBT ecBuilder Template (Web site cataloging)
.MBU Neverwinter Nights Music File
.MBW MarketBrowser (investment charting/analysis)
.MBX Mailbox Message File (Outlook v1-4 or Eudora and others)
.MC MetaCard Script
PlaySaver and PSEmuPro Memory Card Save and Single Game Save
.MC1 MedCalc Data File (statistical research program)
.MC3 Bridge Design Modeler 3D Match-Casting Geometry Control
.MC8 Mastercam 8 File
.MCA i-deas Web ACCESS File
.MCC Mathcad Configuration
Mylar City Character Editor
Dialer10 Calling Card
Monu-Cad Pro CAD File
VectorWorks/MiniCAD File [Viewer]
Incite Media Assistant File
.MCD Mathcad Document
Craig McDowall.com NotePad
Monu-Cad Pro CAD File
Bleem! Memory Card Save
.MCF Mathcad Font
Meta Content Format File (describes a Web site) [Process description]
Master Command File
TMPGEnc Template (Multimedia Container Format File)
.MCH Macromedia Xtra Cache File
.MCI Media Control Interface Command Set
.MCL Multimedia Manager Collection File
Macro Command Language (Symbol handheld terminals)
.MCP Mathcad Printer Driver
Capsule Application Script
.MCQ McAfee Quarantined File
.MCR DataCAD Keyboard Macro File
PlaySaver and PSEmuPro Memory Card Save and Single Game Save
CuteFTP Script
.MCS MathCAD Format File
.MCT Musicator
.MCW MacWrite II Macintosh Text File
.MCX Graphic File
.MD Compressed Archive File
Teknical eLearning Objects Meta-Data File (stores info on related file)
.MD1 Gear CD Suite File
.MD5 MD5summer (generates and verifies md5 checksums) [MD5 Generator] [fsum Checksum Utility]
.MDA MS Access Add-in
MS Access 2 Workgroup
.MDB MS Access Database
MS Access Application
Mediator Multimedia Data
PTC Pro/MECHANICA File (test/optimize designs for structural, dynamic, thermal and durability performance)
.MDE MS Access Database File
.MDF Menu Definition File
MS-SQL Master Database File
Accelio Capture Classic (JetForm) Filler (JetForm Corp became Accelio 12 Sep 2001)
I-deas Master Drafting Machine Data File
.MDL Digitrakker Music Module (by n-FaCToR)
Rational Rose
Quake Model File
3D Design Plus Model
Simulink Simulation Model
ASTi Model Builder File
CA-Compete! Spreadsheet
Half-life Model [XnView]
Moray Model (wireframe modeller supporting POV-Ray 3.1)
Symbian OS MIME Type Library
.MDM Telix Modem Definition
.MDMP WinXP Trouble Report (extension is added to file sent)
.MDN MS Access Blank Database Template [Buy Office XP at Shop.Microsoft]
.MDO MS Internet Information Server Configuration Backup
.MDP MS Developer Studio Project
.MDR FaxTalk Modem Doctor Modem Report File
.MDS Media Description File [Fantom CD Emulator]
.MDT MS Access Add-in Data [Buy Office XP at Shop.Microsoft]
MS ILink Incremental Linker Data Table
.MDW MS Access Workgroup Information [Buy Office XP at Shop.Microsoft]
.MDX dBase IV Multiple Index [File Structure]
Avery Label Pro Re-Index File
.MDZ MS Access Wizard Template [Buy Office XP at Shop.Microsoft]
.ME Information (e.g., READ.ME)
.MEA Meazure File (screen measurement and capture utility)
.MEB WordPerfect Macro Editor Bottom Overflow File
.MED WordPerfect Macro Editor Delete Save
OctaMED Tracker Module
.MEL Ericsson Phone Melody
Maya Embedded Language Script
.MEM WordPerfect Macro Editor Macro
Memory File of Variables
MS FoxPro Memory Variable Save File
.MEN Menu
.MEQ WordPerfect Macro Editor Print Queue
.MER WordPerfect Macro Editor Resident Area
Data Interchange Format
.MES Message File
WordPerfect Macro Editor Work Space
.MET WordPerfect Macro Editor Top Overflow File
Presentation Manager Meta File
OmniPage Document
eDonkey2000 File
.METHODS Likely a text file (e.g., README.METHODS)
.MEU DOS Shell Menus
.MEX Matlab Executable Command
WordPerfect Macro Editor Expound File
mexReader Multimedia File
.MEZ RealArcade Game Information
.MF MetaFont Text File
.MFA MS Site Server 3.0 Report Definition
.MFF MIDI File Format
.MFG MediaForge Runtime Player
.MFM VTeX Multiple Master Font Metrics (a variant of the Adobe Font Metrics (AFM) format?)
.MGC MGCSoft Equation Editor File
.MGCF MagicInstall Compressed File
.MGD Master Grade Gradebook
.MGF Image File
Micrografx Font
Materials and Geometry Format File
.MGL MosASCII Graphics Library
MS Age of Kings File
.MGM MGCSoft Equation Editor Macro File
.MGR MGR Bitmap [XnView]
.MGX Micrografx Picture Publisher Clipart
.MGZ Metal Gear Solid Archive [Dragon UnPACKer]
.MH Graphic File
.MHG Multimedia File
.MHK Riven Movie Data File (Mohawk Archive)
.MHP MS Home Publishing Project
.MHT MS MHTML Document (Archived Web Page)
.MHTML MS MHTML Document (Archived Web Page)
.MI Miscellaneous
CoCreate CAD File
.MIB Management Information Base File (SNMP Management Programs)
.MIC MS Image Composer File
.MID MIDI File
MapInfo Interchange Format (always paired with "MIF")
.MIDI MIDI File
.MIF MIDI Instrument
Adobe FrameMaker Interchange Format
Software License Tracking Tool (CERTAUTH.MIF)
MapInfo Interchange Format File (always paired with "MID")
MicroHof .MIF Assembler File
Image Magick File [XnView]
.MIFF Image Magick File [XnView]
.MII MicroStat II Data File
.MIL Group 4 Fax File
Micro Illustrator Uncompressed Graphic [XnView]
.MIM Multi-Purpose Internet Mail Extensions (MIME) File [MIME]
.MIO mexReader Multimedia File
.MIP Paint Shop Pro Multiple Image Print File
.MIS Delta Force Land Warrior Mission [Fan site]
Tribes 2 Game File
MagicInstall Installation Script (Under development Feb 2002)
.MIX Power C Object File
Multilayer Picture File (MS PhotoDraw 2000 & MS Picture It!)
Don Knuth's MIX Emulator
Command & Conquer Movie/Sound File
Techno eJay Music Mix File
OzWin CompuServe E-mail/Forum Access Index File
.MJ MovieJack DVD Ripper File
.MK Make File
.MKD Malz++Kassner CAD5 Drawing
.MKE Make File
.MKI Picture File
.MKL Malz++Kassner CAD5 Drawing Library
Créatoria
.MKS Tact Data
.ML3 Milestones 3.x Project
.ML6 PowerPoint Milestone File
.MLB Macro Library
.MLD Multilizer Dictionary
Polyphonic Ringtone File for Phones
.MLI Encyclopedia Media List
3D Studio's Material-Library File
.MLK Sierra Mastercook File
.MLM Novel Groupwise E-mail File
.MLS Miles Sound Tools Compressed DLS
.MM Macro Mania Macro
Multimate Advantage File
Lightscape Material Map
.MMB MultiMedia Builder
Oracle Forms Menu Binary Source Code
.MMC Media Catalog
MSoffice Media Content (MS OfficeXP)
.MME Multi-Purpose Internet Mail Extensions (MIME) File [MIME]
.MMF Meal Master Format
MS Mail File
Polyphonic Ringtone File for Phones
.MMI Memo Open Client
.MML Mail Meta Language
.MMM Animation MS Multimedia Movie
MacroMind Directory RIFF/RMMP Format Movie
.MMO RapidFile Memo Writer
.MMP MindManager Map File
Gammadyne Mailer Project File
CoCo Systems VisiMap
Bravado Board Video Output Format
.MMPBT MindManager Branch Template File
.MMPT MindManager Template
.MMS Miles Sound Tools (Midi+DLS/MLS)
.MMSCRIPT MindManager Script File
.MMT Nimbus 7 SAMS Data File (monthly mean retrieved temperatures)
CoCo Systems VisiMap
.MMV Sony MovieShaker File
.MMW Microsoft Media Content
.MMX Command & Conquer Red Alert 2 Map File
Oracle Forms Compiled Menu
.MMZ MusicMatch Theme File
.MN2 Descent2 Mission File
.MN3 Descent3 Mission File
.MN4 Microsoft Money Database (older version)
.MNB MuPAD File
.MNC My Notes Center File
.MND AutoCAD Menu Program File
MNI Mandelbrot for Windows
.MNG Animation Shop Animation
DeLorme Map'n'Go Map
Multi-image Network Graphic [XnView]
.MNO Monopoly Saved Game
Macromedia Design Notes
.MNR AutoCAD Compiled Menu File
.MNS AutoCAD ASCII Menu File
.MNT Foxpro Menu Memo
.MNU Menu File (various)
HP NewWave Advanced Macro
.MNW Menu File (various)
.MNX AutoCAD Compiled Menu File
Foxpro Menu
.MNY MS Money File
.MO Dymola Simulation
.MOB Device Definitions
.MOD Music File (various)
Model File (various)
Modula-2 Program File
ProModel Optimization Software Suite Model
Windows Kernel Module
Amiga and PC Tracker Module
MS Multiplan Spreadsheet
Monarch File (data mining)
.MODEL Catia File
.MOL MDL Molfile (MIME type chemical/x-mdl-molfile) [Requires Chime Plug-in]
Easy Palette Object Library
.MOM SPEFO Stellar Spectra Analysis File
.MON ReadMail Monitor (UNIX)
.MONTE CRiSP Harvest File
.MOP Mopac Input File (MIME type chemical/x-mopac-input)
.MOR Poser 3D Morph Target File
.MOS Dymola Simulation
.MOV QuickTime Video Clip
Apple QuickTime Audio
AutoCAD AutoFlix Movie
.MOVERADDIN Mover (Inventory Management) Add-in
.MOVERBACKUP Mover (Inventory Management) Backup Set
.MOVERCONFIG Mover (Inventory Management) Configuration
.MOVERDB Mover (Inventory Management) Database
.MOVERREG Mover (Inventory Management) Registration Info
.MOVERTEMPLATE Mover (Inventory Management) Template
.MOVIE Video
.MOX Extend Simulation Model File
.MOZ Netscape Temp File
.MP Multiplan File
Maya Personal Learning Edition File
EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.MP+ MpegPlus Audio File (replaced by .MPC)
.MP1 MPEG Audio Stream, Layer I
.MP2 MPEG Audio Stream, Layer II
.MP2V MPEG Audio Stream, Layer II
.MP3 MPEG Audio Stream, Layer III
SHARP MZ-series Emulator File
.MP4 iVAST MPEG-4 (hold BIFS-Binary Information For Scene representation) [MPEG-4 Industry Forum]
.MPA MPEG Audio Stream, Layer I, II or III
Palm Memo File
.MPB TruVideo Video-only MPB Stream [Win Media Player Plug-in]
.MPC MS Project Calender
MP3 Collector Collection Manager File
VersaPro Compiled Motion Block
Musepack Audio File (new format replacing .MP+)
.MPCB ReliaSoft MPC 3 (MSG-3 Aircraft Maintenance Program Software)
.MPD SCSI MiniPort Driver
MS Project Database File
.MPDEX MPdex MP3 Database Utility
.MPE MPEG Movie Clip
.MPE.EXE MP3 Digital Player Wrapper
.MPEG MPEG Movie
.MPF MS Design Gallery
MosASCII Project Workspace File
.MPG MPEG Animation
MPEG 1 System Stream
.MPGA Mpeg-1 Layer3 Audio Stream
.MPH MS Publisher
.MPJ RoboHTML Project
Mountain Video Editing File (Atari)
.MPK Augmented MS-Project File
.MPM WordPerfect MathPlan Macro
Max Payne MOD Archive [Added Info]
.MPNT MacPaint Bitmap File [XnView]
.MPO Augmented MS-Project File
.MPP MS Project File
CAD Drawing File
.MPQ Blizzard Game Data File
(also other games)
.MPR Foxpro Program
Westwood Studios Game File (e.g., Red Alert, et.al. - should be a text file)
FileMaker Spelling Dictionary
.MPS Multimedia File
MPEG-1 Audio and Video File (system stream)
Casio PDL Pocket Streets Map (Microsoft product - see just below)
MS Pocket Streets Map File
Max Payne Saved Game
Garmin Mapsource GPS Mapping Interface
MySweetNix! (change MSN Messenger Service nickname every n seconds)
.MPT MS Project Template File
Multipage TIFF Bitmap
.MPV MS Project View
MPEG-1 Video File
MyPhotoZip File (compression for image files)
.MPV2 MPEG Audio Stream, Layer II
.MPW MosASCII Project Workspace File
.MPX Foxpro Compiler Menu
MS Project Export File
RCA/Lyra Handheld MP3 Player File (secure MP3 format that only plays in this player)
.MPZ MyPhotoZip File (compression for image files)
.MQP Multiquence Project (multitrack digital audio and video editing)
.MRB MS C++ Multiple Resolution Bitmap Graphic
.MRC MIRC Script File
Bibliographic Data Format
.MRF Marks Russel File [XnView]
.MRI MRI Scan
.MRK Informative Graphics Markup File
.MRO SharpEye Music Reader File
.MRS WordPerfect Macro Resource File
.MRW Minolta Diamage RAW Graphic (use view software supplied with camera)
.MS Checksum File for Anti-Virus
.MS1 OzWin CompuServe E-mail/Forum Access Message File
.MS3D MilkShape 3D Model
.MSA Magic Shadow Archive
.MSC Microsoft Common Console Document
MS C Makefile
CRiSP Harvest File
.MSF Multiple Sequence File (biomedical analysis)
.MSG Program Message
OzWin CompuServe E-mail/Forum Access Message File
MS Mail Message
.MSH MASH (The Microsoft Agent Scripting Helper)
.MSI Windows Installer File (associates components with features and contains installation control info)
.MSK Autodesk Mask File
PaintShop Pro Mask File [XnView]
CARA-Script-Interpreter-Engine Mask (4th generation database language)
.MSM MultiSIM Circuit Diagram
.MSN MS Network Document (possibly nicknames)
Descent Mission File
.MSO MS Word OLE Web Page Storage Stream [Buy Office XP at Shop.Microsoft]
MS FrontPage File [Buy Office XP at Shop.Microsoft]
Math Script Object File
.MSP MS Paint Graphic File [XnView]
Windows Installer Patch
Magix Music Studio File
.MSPX Related to Microsoft's .NET (still researching)
.MSR OzWin CompuServe E-mail/Forum Access SYSOP File
.MSRCINCIDENT MS Remote Assistance Request
.MSS Manuscript Text File (various)
Game Score
.MSSYTLES Windows Visual Style File
.MST Minispecification
DATAIR Pension System Master File
Windows SDK Setup Transform Script (contains mods to apply to package during installation)
ChemFinder Chemical Structure Index
Visual Test Source File
.MSW Word Text File [Buy Office XP at Shop.Microsoft]
.MSWMM Microsoft Windows Movie Maker Project (Part of WinME & XP)
.MSV Sony Memory Stick Format
.MSW MS Word Text File
.MSX Compressed CP/M File Archive
.MT2 MadTracker File (32-bit tracker for Windows)
.MTA MS Flight Simulator Maintenance File
.MTB MINITAB Exec File (a macro file)
.MTD Digital Sheet Music [Viewer]
.MTE MadTracker Envelope File (32-bit tracker for Windows)
.MTF Darkstone Archive [Dragon UnPACKer]
MicroSurfer File (Link manager/accelerator)
.MTH Derive Math File
.MTI MadTracker Instrument File (32-bit tracker for Windows)
.MTK Matrikon Software License File
.MTL MathLook File
.MTM MultiTracker Music Module
.MTP L&H Power Translator Pro
MadTracker Pattern File (32-bit tracker for Windows)
.MTS Viewpoint iPix File
MadTracker Sample File (32-bit tracker for Windows)
.MTT MSN Messenger Saved Contact File
.MTX Viewpoint iPix File
.MTV MTV Ray-tracer [XnView]
.MTW Minitab Data File
.MTX Temporary File often used by a browser or TWAIN device
MadTracker Extension File (32-bit tracker for Windows)
.MU Quattro Menu
.MUC Music Collector Collection Manager File
.MUF ProtoMuck Multi User Forth Program
.MUL Ultima Online Game
.MUP Music Publisher File
.MUS MusicTime Audio File
Finale Music Score
Harmony Assistant, Melody Assistant, Myriad Music plug-in, Melody Player
.MV Miva Script
.MV3 Oozic 3D MusicVideo
.MVA Matrox Video Card Driver
.MVB Database
MS Multimedia Viewer File [Viewer Download]
Note: The viewer download is old. Don't overwrite any new files with old.
.MVC Music Collector Collection Manager File
.MVD MicroDVD DVD Movie
.MVE Interplay Video File [Descent2]
.MVF Movie Stop Frame File
.MVI AutoCAD Movie Command File
.MVW Saber LAN Log File
.MW4 MechWarrior 4 Map
.MWD Photo Soap2 File
.MWF ProMotion Animation
Autodesk MapGuide Author Map Window File
.MWM Mail Warrior File
.MWP Lotus Wordpro 97 Smartmaster File
MegaWorks Pack File [Dutch]
.MWS Maple Spreadsheet
.MWV MovieWorks File
.MX3 Bitbop Tuner Locked Sound File
.MXC ArcView Geocoding Index For Read-Write Coverages (ODB format)
.MXD GIS Project File (map information)
.MXE Macro Express
Mindex Effect Album
.MXI Proteus File (personal light and sound stimulation system)
Macromedia Extension Information
Mindex Indices file for Indexed Images
.MXM MS Project/Outlook Team Assign Task
Mindex Master Index File for a Category
.MXP Macromedia Extension Manager
ArcReader Published Map
.MXS ArcView Geocoding Index For Read-Write Shapefiles (ODB format)
.MXT MS C
ArcMap Map Template
.MYD MySQL Data File
.MYI MySQL Data File
.MYDOCS MyDocs Drop Target
.MYP Make Your Point Presentation
.MYS Myst Saved Game
.MYW MyWorld Education Drawing
.MZ MOZART Music Document
.MZB MegaZeux Board
.MZE MidiMaze File (Atari Game) [Maze Utilities]
Maze Creator File
.MZF SHARP MZ-series Emulator File
.MZP MOZART Percussion File
.MZQ SHARP MZ-series Emulator QuickDisk File
.MZS SHARP MZ-series Emulator File
.MZT MOZART Template File
SHARP MZ-series Emulator File
.MZX MegaZeux World
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.N1E OM2 OMALI NENA Encrypted Document Version 1
.N2E OM2 OMALI NENA Encrypted Document Version 2
.N2P Net2Phone File
.N3E OM2 OMALI NENA Encrypted Document Version 3
.N4E OM2 OMALI NENA Encrypted Document Version 4
.N64 Nintento 64® Emulation ROM Image
MiMiX Emulator
.NA2 Netscape Communicator Address Book
.NAB Novell Groupwise Address Book
Netscape Communicator Address Book
.NAD Noder File (Polish)
.NAI WinINSTALL File
.NAM MS Office Name File (often DISPLAY.NAM - text description)
.NAN Nanoscope File
.NAP NAP Metafile Vector Image
Napster Music Security Definition File [How It Works]
EnerGraphics VideoShow File
Electrical Network Analysis and Planification
.NASB TheWord & Bible Companion New American Standard Bible
.NAV MSN Application Extension
.NB Nota Bene Text File
Mathematica Notebook
.NC Graphics File
Numerical Control Machine Instructions
.NCA NetCam Supervisor Archive [Folder extension for this product] (Digital network CCTV)
.NCB MS Developer Studio File
.NCC Computer Numeric Control File
NetControl V1 1999 (freeware network health probe)
NetCam Supervisor Directory [Folder extension for this product] (Digital network CCTV)
.NCD Norton Change Directory
NTI CD-Maker File
CoverDesigner [XnView]
.NCF Netware Command File
Lotus Notes Internal Clipboard
.NCH Outlook Express Folder File [Buy Office XP at Shop.Microsoft]
On Hold Message/Music File
.NCI NetCam Supervisor Meta Data (Digital network CCTV)
.NCM NetCam Supervisor Video (Digital network CCTV)
.NCR NCR Image [XnView]
.NCT CoverDesigner [XnView]
.NDB Intellicom Network Database
.NDF NeoPlanet Browser File
.NDL Lotus Notes
.NDO 3D Low-polygon Modeler
.NDS Indiana Jones and the Infernal Machine Saved Game
.NDX Index (usually dBase compatible) [File Structure]
ArcView Fonts Index File (UNIX only)
.NE1 OM2 OMALI NENA Document Version 1
.NE2 OM2 OMALI NENA Document Version 2
.NE3 OM2 OMALI NENA Document Version 3
.NE4 OM2 OMALI NENA Document Version 4
.NEB Nortec H.E.L.P. (humidity calculations)
.NED MSN Application Extension
.NEF Raw Graphic File Format for Nikon Digital SLR Cameras [XnView]
.NEO Neochrome (ST & TT) [XnView]
.NES Nintendo Entertainment System ROM Image
.NET Network Configuration
OrCad Netlist Output File
.NEU MENSI 3D Laser Scanner File
.NEW New Information (e.g., WHATS.NEW)
.NEX Nexcon System File (Nexcon is a shell replacement)
Neurological Data for Statistical Analysis [Neuroexplorer (and others)] [File Format & More Info]
.NFF WorldToolKit Neutral File Format [Format]
.NFO Folio Infobase
Text File [Open in text editor]
MS System Info File (XML format)
Warez Group Info File
.NG Norton Guide Online Documentation
.NGF Enterasys Networks NetSight Generated Format File
.NGG Nokia Group Graphics [XnView]
.NGS NGSSniff File
.NH NetHack Defaults File (defaults.nh and/or NHAccess.nh)
.NHF Nero HFS-CD Compilation
Nero File (CD burning/design software)
.NICK Office Data File
.NIL Norton Icon Library File
.NIF NetImmerse File Format
.NIT ArcView INFO Table Definitions File
.NITF National Imagery Transmission Format [XnView]
.NIV TheWord & Bible Companion New International Version Bible
.NJP njPipes Compiler File (generally java or NetRexx code)
.NJX NJStar Document
.NK2 Office Data File
.NKJV TheWord & Bible Companion New King James Version Bible
.NLB Oracle 7 Data
.NLD ATI Radeon Video Driver File
.NLF ReliaSoft Weibull++ 6 (Life Data Analysis Software)
MicroSim PCBoard Netlist File for Schematics
.NLM Netware Loadable Module
LogoManager for Nokia Phones (format for Nokia phone images) [XnView]
.NLS Code Page National Language Support
.NLTRACK NoLimits Rollercoaster Simulator Track File
.NLU Norton Live Update E-Mail Trigger File
.NLX FormWorx Form
.NMA Normalised Extinction Corrected Differential Photometry
.NMD SwordSearcher File
.NMI SwordSearcher File
.NMO Virtools Behavioral Objects
.NMS Numega Softice's Loader File (includes debugging info)
Virtools Graphical Scripts
.NNB newnovelist Story Outline
.NNI ANNI Artificial Neural Network Investing
.NOB VersaPro Word Exchange File
Vampire: La Mascarade Archive [Dragon UnPACKer]
.NOD Noder File (Polish)
.NOL Nokia Operator Logo [XnView]
.NOM Aonix Nomad File (4GL, database, report writer)
.NON Star Wars - Tie Fighter Mouse Options
.NOR ATI Radeon Video Driver File
.NOT ActiveNote Post-It-Notes
Acrobat Spelling File
.NOW Text File (e.g., README.NOW)
.NP Nokia Planner Project Schedule
Cliq Accessories Notepad Text [Linux Suite PDF Description]
.NPA ReliaSoft Weibull++ 6 (Life Data Analysis Software)
.NPD Noder File (Polish)
.NPI dBASE Application Generator Source
.NPK MikroTik RouterOS Upgrade Package
.NPL DART Pro 98 Noiseprint Info
.NPM Nokia Picture Message
Neopaint Mask [XnView]
.NPT DART Pro 98 Noiseprint Archive Import
.NR3 Nero MP3 CD-ROM Compilation
.NRA Nero Audio-CD Compilation
Nero File (CD burning/design software)
.NRB Nero CD-ROM Boot Compilation
Nero File (CD burning/design software)
.NRC Nero UDF/ISO CD-ROM Compilation
.NRD Nero DVD Compilation
.NRE Nero CD Extra Compilation
.NRG Norton Registration Entries
Nero CD-Image
Nero File (CD burning/design software)
IsoBuster File
.NRH Nero Hybrid CD-ROM Compilation
Nero File (CD burning/design software)
.NRI Nero ISO CD-ROM Compilation
Nero File (CD burning/design software)
.NRL iManage File
.NRM Nero Mixed-Mode-CD Compilation
Nero File (CD burning/design software)
.NRSV TheWord & Bible Companion New Revised Standard Version Bible
.NRT Nokia RingTone
.NRU Nero UDF/ISO CD-ROM Compilation
Nero File (CD burning/design software)
.NRV Nero Video-CD Compilation
Nero File (CD burning/design software)
.NRW Nero MP3 CD-ROM Compilation
.NS2 Lotus Notes 2 Database
.NS3 Lotus Notes
.NS4 Lotus Notes Database
.NS5 Lotus Notes Domino File
.NSB Novaschem School Schedule
.NSC Noder File (Polish)
Windows Media Station File (used to gather info for WMP to play content) [Security patch]
.NSD NRG Site Database
.NSF Lotus Notes Database
NES Sound File [Winamp (plugin), Meridian, Nosefart]
.NSG Lotus Notes
.NSH Lotus Notes
.NSI Nullsoft Install System Script
.NSO NetStudio Easy Web Graphics File
.NSP Multi-Speech Sound File
.NST Audio File
Noise Tracker Music Module
.NSV Winamp3 Video Format File
.NSX HiPer-Six Index File
.NT Windows NT Startup File
.NTF Lotus Notes Database Template
.NTO NTOScanner (TCP port scanner)
.NTP Neato CD Labels
.NTR Netrun Executable Text File
.NTS Norton Tutorial
Netsend Executable Text File
.NTW LVNet - Low Voltage Networks Analysis
.NTX Clipper Index
.NTX Web Audio File
Network Terminal Accelerator Adapter Card Configuration Information
CARIS Marine Navigation Info
.NTZ InVircible Directory Integrity Information
.NUF Procomm Plus New User Message
.NUL Grand Theft Auto (Playstation 2) Game File
.NUM Guitar Chords in Nashville Numbering System Format [On-line Guitar Archive]
.NV Juno Access Number Info File
Visicontrol MVS-20 Non-Volatile Memory Backup File (Ver
A4Tech Scanner Graphic
.PMD Pagemaker File
Polyphonic Ringtone File for Phones
.PME Plazmic Media Engine File
.PMF ArcReader GIS Mapping File
.PMG Pagemaker Group File (EPS graphic)
Paint Magic [XnView]
.PMI Pegasus Mail Message Folder Index File
.PML NT4 Performance Monitor Log File
Pegasus Mail Distribution List
PADGen Program Information
Windows Performance Monitor File
.PMM Pegasus Mail Mail Message Folder
Amaris BTX/2 Program
.PMO Print Master Gold Text
.PMP Sony DSC-F1 Cyber-shot [Acdsee] [XnView]
.PMR Windows Performance Monitor File
.PMW Windows Performance Monitor File
.PMX Pegasus Mail File
.PN3 Harvard Printer Driver (Harvard Graphics taken over by Serif)
.PND DATAIR Pension System Pending File
.PNF Precompiled Setup Information (Temporary file seen during installs)
.PNG Portable (Public) Network Graphic (proposed GIF replacement) [XnView]
PaintShop Pro Browser
Fireworks Image File
.PNL PEERNET Label Designer File
.PNM PBM Portable Any Map Graphic [XnView]
.PNR PEERNET Label Designer File
.PNS PEERNET Label Designer File
.PNT MacPaint Bitmap Graphic [XnView]
Paperport Thumbsview
MarkMail Qwk Reader Pointers
World Data Bank II Country Data File (derived from CIA data)
.PNTG MacPaint Bitmap Graphic [XnView]
.PNU PEERNET Label Designer File
.PNV CRiSP Harvest File
.PO2 STABCAL (stability calculation for aqueous systems) File
.PO3 STABCAL (stability calculation for aqueous systems) File
.PO5 STABCAL (stability calculation for aqueous systems) File
.POC PocoScript File
.POD Terminal Velocity Archive [Dragon UnPACKer]
.POG Descent2 File
.POH Optimized Geoworks .GOH File
.POL Music File
AscToHTM Policy File
Windows Policy File
.POLICY Java Policy File
.POO Poo Patrol Game File (unverified)
.POP dBase Popup Menu
PopMail Message Index
.POS ProCite Output Styles
QuickPOS IIF File (see IIF above)
.POT PowerPoint Template [Buy Office XP at Shop.Microsoft]
.POV Persistence of Vision Ray-tracer
.POW PowerChords Chord Chart
.PP Compressed Amiga Archive File
.PP2 Curious Labs Poser Prop File
.PP4 Picture Publisher
.PP5 Picture Publisher
.PPA PowerPoint Add-in [Buy Office XP at Shop.Microsoft]
.PPB WordPerfect Print Preview Button Bar
.PPC Roxio Easy CD Creator File
.PPD PostScript Printer Description
.PPF Turtle Beach Pinnacle Program File
Jasc Paint Shop Pro 7 Preset File
Micrografx Picture Publisher File (Micrografx now part of Corel)
PlayStation Patch File
MENSI PointScape 3D Laser Scanner Project File
.PPG MS PowerPoint Ppresentation
Professor Franklin's Photo Print Gold
.PPI MS PowerPoint Graphics File [Buy Office XP at Shop.Microsoft]
.PPJ Adobe Premiere Video Editing File
.PPK PuTTY Win32 Telnet/SSH Client
.PPL Harvard Polaroid Palette Plus ColorKey Driver (Harvard Graphics taken over by Serif)
.PPM PBM Portable Pixelmap Graphic [XnView]
.PPMA Portable Bitmap [XnView]
.PPO Clipper Preprocessor Output
.PPP Serif PagePlus Publication
Enfocus Preflight Profile
Parson Power Publisher
Punk Productions Picture [XnView]
.PPR Cognos PowerPlay OLAP Multidimensional Cube
.PPRINT Pics Print File
.PPS PowerPoint Slideshow [XnView] [Buy Office XP at Shop.Microsoft]
ArcView Processing Set Codes
.PPT PowerPoint Presentation [XnView] [Buy Office XP at Shop.Microsoft]
.PPX Serif PagePlus Publication
Cognos PowerPlay OLAP Reporting
.PPZ PowerPoint Packaged Presentation [Buy Office XP at Shop.Microsoft]
.PQ Adobe Pagemaker Default Printer Style
.PQA Palm Query Application File (database for wireless access)
.PQF Corel Presentations File
.PQI PowerQuest Drive Imaging Software
.PQW Corel Presentations 9 Runtime
.PQX Power Quest DRive Image Index
.PR EROSION 3D Precipitation Parameters [Format (pdf)]
Sun Icon/Cursor [XnView]
.PR1 OzWin CompuServe E-mail/Forum Access Purged Message File
.PR2 Persuasion Presentation
dBase IV Printer Driver
Proteus Session (personal light and sound stimulation system)
.PR3 dBase IV PostScript Printer Driver
Aldus Persuasion Presentation
.PRB xyALGEBRA File
.PRC Palmpilot Resource File [File Format]
Picture Gear Pocket [XnView]
.PRD Printer Driver
.PRE Freelance Presentation
MS Programmer's WorkBench Settings
.PREFS Preferences File (various)
.PRF Preferences File (various)
dBase IV Printer Driver
Monarch Portable Report File (data mining)
Profiler Output
PICS Rules File
Polychrome Recursive Format [XnView]
Fastgraph Pixel Run Format Grahics
.PRG Program File (various)
OzWin CompuServe E-mail/Forum Access Purged Message File
WAVmaker Program
Atari Program
SHARP MZ-series Emulator File
SpecEm Snapshot
.PRI LocoScript Printer Definitions
Prisms [XnView]
.PRJ Project File (various)
3D Studio File
HitPlayer Advanced Playlist File
Monarch File (data mining)
ArcView Projections Definition File
.PRK Tony Hawk's Pro Skater 2 Saved Park
CampgroundMaster/ResortMaster Database
.PRL Process Revolution Object Library File (Diagrams, Process Maps, Flow Charts)
.PRM Parameter File
.PRN Printer Text File (various)
HP Printer Control Language [SwiftView]
DataCAD Windows Printer File
XYWrite Printer Driver
PostScript File
.PRO Guitar Chord File [On-line Guitar Archive]
PROLOG Program File
Creamware Pulsar Audio File
Sid Meier's SimGolf
.PRP Palace Prop File
InstantDB Database File
.PRS Printer Resource File
WordPerfect Printer Resource Font File
dBase Procedure
Harvard File (Harvard Graphics taken over by Serif)
.PRT Printer Configuration (various)
Printer-formatted File
SCEdit Part File (Roland Sound Canvas sound modules; MIDI-related)
Unigraphics Part File (CAD modeling data)
CADKEY Part File
Pro/ENGINEER Model File
Associated with the W32/Parrot-A worm; particularly if found in the
Windows directory along with .EXE files of the same root name.
Process Revolution Template File (Diagrams, Process Maps, Flow Charts)
.PRV PsiMail Internet Provider Template
Previous Version (used for files that change)
SecretAgent Private Key File (file encryption)
.PRX Foxpro Compiler Program
Process Revolution Diagram File (Diagrams, Process Maps, Flow Charts)
.PRZ Freelance Graphics 97 File
.PS PostScript [Ghostscript] [XnView]
.PSB Pinnacle Sound Bank
Project Scheduler Configuration File
.PSD Photoshop Format [XnView]
Apple Viewer File
DESIGN II for Windows General Flowsheet (Refining Process Simulation)
.PSE IBM Printer Page Segment Bitmap [XnView]
.PSF Chiwriter PostScript Printer Font
PhotoStudio Graphic [XnView]
.PSH Punch Home Design Series CAD Data File
.PSI PSION A-law Audio
.PSL MicroSim PCBoard Padstack Library File
.PSM Turbo Pascal Symbol Table
Protracker Studio Module Format
Epic Games Sound Data
SolidEdge CAD File
PrintShop Mail (desktop publishing)
.PSMDOC PrintShop Mail (desktop publishing)
.PSMODEL Delcam Powershape (3D CAD)
.PSN Post-it® Software Notes
.PSP PaintShop Pro Image [XnView]
Project Scheduler Planning File
Prodea Synergy Procedure
.PSR Project Scheduler Resource File
.PSS Sony Playstation Game File
Axialis Screen Saver Producer File
.PST MS Outlook Personal Folder File
Ulead Pattern [XnView]
.PSW WinXP Backup Password File
.PSX Dirty Little Helper Chat File
X-Plorer/X-Ploder, Cheat Machine, etc. Single Game Save
.PSY PLD2 System File
Psychedelic Windows Products
.PT Kodak Precision Transform [Download]
PassMark PerformanceTest File
.PT3 Harvard Device Driver (Harvard Graphics taken over by Serif)
PageMaker Template
.PT4 PageMaker Template
.PT5 PageMaker Template
.PTB Power Tab Guitar Tablature Editor
PubTach Batch Works Script
.PTC NRG Symphonie Patch File
.PTDB Peachtree Accounting Database
.PTH 4D Database Windows Pathname Document
.PTI IBM Configurator Configuration
.PTK Red Alert 2 File
.PTL Site Builder Path Translation List
Python Template Language File
Rational Rose File (model-driven development tool)
.PTM PolyTracker Music Module
MS MapPoint Map
PubTech BatchWorks Macro
.PTN PaperPort Thumbnail Images (Hidden file: PPTHUMB.PTN)
.PTP Act! Modem Sync File
.PTR QMail Qwk Reader Pointer
.PTS Infinity Engine Game Tileset
Halflife Map Creation Debug File
.PTT MS MapPoint Template
.PTX E-Transcript of Court Proceedings [Viewer]
.PUB PGP Public Key Ring
Ventura Publisher
MS Publisher Document
The Sims (Maxis) Family Data
Print Perfect Gold Template
.PUBHTML MS Publisher HTML Document
.PUBMHTML MS Publisher Archived HTML Document
.PUD Warcraft II PUD Map [PUD Browser] [PUD Format]
.PUF Puffer Encrypted File (File & E-mail Encryption)
.PUT Instalit Script
.PUZ Across Lite Crossword Puzzle [FAQ]
Packed MS Publisher File
.PVA Hauppauge DVB-Software
.PVL Instalit Library
.PVS Scarlett Expert System Compiler Reserved Words File (Scarlett is not presently available)
.PVT Local Fidonet Pointlist
.PW Professional Write Text File
.PWA Password Agent File
.PWC COSMI Street Maps and Vacation Planner
.PWD Pocket Word Document
AutoCAD Password File (ACAD.PWD)
Password Pro File
.PWF ProCite Workforms
.PWI Notes for Windows CE
.PWK Password Keeper File
.PWL Password List
.PWM Pegasus Mail File
.PWP Photoworks Image File
Professional WritePlus Document
Seattle Film Works Multi-image File (Actually MGI PhotoSuite File) [Filmworks Viewer] [XnView]
.PWT HotDog PageWiz Template
MS Pocket Word Template File
Autocad Publish-to-Web Template
.PWZ PowerPoint Wizard [Buy Office XP at Shop.Microsoft]
.PX Primary Index
Paradox Primer Database Index
.PXA Pixia Color Painter File [Japanese] [XnView]
Pegs [XnView]
.PXB Pixibox [XnView]
.PXD eJay Mixer File
.PXE Partial XML Envelope
.PXI Pixie File (scalable vector images viewed with an applet)
Note: The file $$d2k.pxi is associated with a Trojan
.PXL Pocket Excel Spreadsheet
.PXN PictureWorks PhotoEnhancer Graphic Image (Kodak format not now supported)
.PXR Pixar Picture [XnView]
.PXS Pegs [XnView]
.PY PYTHON Script
Yahoo Saved Messages
Oracle Batch Procedure
.PYC Compiler PYTHON Script
.PZ2 Curious Labs Poser Pose File
.PZ3 Curious Labs Poser Document
.PZA MGI PhotoSuite II/III/4 Album File
.PZC GraphPad Prism Script
.PZD Pizazz Plus Defaults
.PZF GraphPad Prism Project
.PZL Puzzle [XnView]
Lode Runner Game Puzzle
Jigs@w Puzzle (virtual jigsaw)
.PZM GraphPad Prism
.PZO Pizazz Plus Overlay
.PZP Pizazz Plus Palette
MGI PhotoSuite II/III/4 Project File [XnView]
.PZS Pizazz Plus Settings
MGI PhotoSuite II/III/4 Slide Show File
.PZT Pizazz Plus Transfer File
GraphPad Prism Template
.PZX Pizazz Plus Swap File
.PZZ Curious Labs Compressed Poser File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.Q0 Q0 Graphic [XnView]
.Q00 Quicken 2000 File
.Q01 Quicken 2001 File
.Q1Q LunarCell Plug-in File
.Q98 Quicken 98 File
.Q99 Quicken 99 File
.Q9Q BladePro Graphic Plugin File
.QAB QABUTIL File
SYBYL Binary Field Files
.QAD PF QuickArt Document
.QAG Norton Desktop Quick Access Group
.QAP Omnis Quartz Application File
.QAX ExpressTracker Data File
.QB1 Quicken File
.QBA QuickBooks File
.QBB QuickBooks for Windows Backup File
.QBD Keyboard Layout
.QBE Example Query (Query By Example)
dBase IV Saved Query
Quattro Pro Saved Query
.QBL Business Lawyer Document
.QBO dBase IV Ordered Query
.QBS MS Quick Basic Program File
.QBW QuickBooks for Windows File
Quicken File
.QCB MS Combat Flight Simulator Quick Combat Editor File
QConBridge (HL93 Live Load Analysis for continuous bridge structures)
.QCD QuarkCopyDesk SE
Cliq Accessories Phonebook Data [Linux Suite PDF Description]
.QCF Q-emuLator (a Sinclair QL emulator)
QuickLogic Constraint File
.QCH Quicken for DOS ver 2 Data File
SSI Dark Queen of Krynn File
.QCI Massively Parallel Quantum Chemistry Program File
Cliq Accessories Phonebook Index [Linux Suite PDF Description]
.QCK Quick Charts File
Quick Foram Count File
VAX CRYSTALS Chemical Crystallogaphy File
QuickCard File
Jigsaw 2 Astrological Tool File
.QCM 3164 Emulator Quick Command File
QUCM Application File (Link is PDF file) (interface CATERPILLAR CCM devices to POWERLOGIC system)
.QCP Qualcomm PureVoice File
.QCS CADQC Standard File
.QCT Memory-Map File (Navigation software for digital maps)
.QD SHARP MZ-series Emulator File
.QD? Omnis Quartz Data File Segment (can be 0 to 9)
.QDAT Quicktime Installer Cache
.QDF Quicken for Windows Data File
.QDI Dictionary
Quicken Data File
.QDK Quarterdeck QEMM File
.QDT QuickBooks UK Accountancy Data File
Quicken Data File
Question Mark Desigener Test File
Quark Xpress Dictionary File
.QDV Steve Blackstock Giffer Graphics File
Random Dot Software QDV Graphic [XnView]
.QEF Excel Query [Buy Office XP at Shop.Microsoft]
.QEL Quicken Electronic Library File
.QEM Expensable Report
.QEP IRMA Wordstation for Windows
.QEX ExpensAble Data File
.QFI QuickTime Image
.QFL Family Lawyer Document (Now with Learning Company from Quicken)
.QFN QuickTime Font File
.QFX Quick Link Fax
.QIC Backup Set [Note: People report trouble moving .QIC backup from Win9x to WinXP.
See the Computer Knowledge QIC page for more info.]
.QIF Quicken Interchange Format
QuickTime Image
.QIX Quicken for DOS ver 2 Data File
.QLB MS C Quick Library
.QLC PostScript Help File
.QLE QOOLE (Quake Object Oriented Level Editor)
.QLF Family Tree Maker Genealogy File
.QLP QuickLink Printer Driver
.QM Quality Motion File
.QM4 QMail Mail Door Option or Services File
.QMD Quicken for Windows ver 5,6 Data File
.QML Quicken for DOS ver 2 Data File
.QMR OzWin CompuServe E-mail/Forum Access Quickscan History
.QMT Quicken Memory List
.QN2 QuickNote File
.QNA High ASCII Quake Name Maker
.QNC Cliq Accessories Notepad Customization [Linux Suite PDF Description]
.QND Cliq Accessories Notepad Data [Linux Suite PDF Description]
.QNI Cliq Accessories Notepad Index [Linux Suite PDF Description]
.QNM High ASCII Quake Name Maker
.QNT Chromeleon Quantification Method
.QNX Quicken Indexes
.QPB Quicken Payroll File
.QPD QP Software Dynamic Plug-in (expected web release 1 Mar 2002)
.QPR OS/2 Printer Queue Driver
Foxpro Relational Query
.QPS QP Software Application File (expected web release 1 Mar 2002)
.QPW Quattro Pro Project File
.QPX Foxpro Ordered Query
.QQT Quick Qard Technology Qardware Definition File
.QR2 Delphi Database Quick Report File
.QRD BI/Query Query Result (used to be Andyne GQL)
.QRP Centura Report Builder File
Liberty for Windows Report File
Dosh Software File
.QRS WordPerfect Equation Editor
.QRT QRT Ray Tracing Graphic [XnView]
.QRY dBase IV Query
MS Query
BI/Query Query
.QS9 OzWin CompuServe E-mail/Forum Access Scan Result File
.QSA Encrypted QSA Specifications Database Export File
.QSC Pxyl Visuals Chart
.QSD Quicken for Windows Data File
.QSF Millennium 3 Quick Start File (payroll software)
.QSL OzWin CompuServe E-mail/Forum Access Forum Quickscan List
.QSM QuadriSpace Model Format File (2D/3D presentations)
.QST Quake Spy Tab File
.QT Quicktime Video
.QTC Incite Media Assistant File
QuickTime 2.0 (or later) for Windows CODEC
.QTF Qtracker Filter (parameters used to filter music or game servers)
.QTI QuickTime Image [XnView]
.QTIF QuickTime Image [XnView]
.QTK Apple Quicktake File (PICT variant created by Quicktake 100/150 camera. Quicktime player needs QuickTake driver to show.)
.QTL Quicktime Movie
.QTM QuickTime Movie
.QTMP Qtracker Mapshot Pack (images of game levels)
.QTP QuickTime Preferences
Astra Quicktest Report
.QTPF QuickTime PreFlight Text
.QTPP Qtracker Program Package (Used to distribute updates)
.QTS Macintosh PICT Image
QuickTime Image
.QTSK Qtracker Skin (PlayerWatch skin file)
.QTW QText File (mixed English/Hebrew)
.QTX QuickTime 3/4 for Windows CODEC
Qtext Text File (unverified)
.QUE Task Scheduler Queue Object
CuteFTP Queue File
.QUICKEN Quicken Spreadsheet
.QVM Quake File (UI.QVM or GAGAME.QVM in VM directory)
.QW Symantec Q&A Write Program File [Support]
.QW5 Quicken 5 File
.QW6 Quicken 6 File
.QWB MS Money Quotes WriteBack Import File
.QWK QWK Reader Message File
.QWP Quiptics Puzzle File
.QXB Quark Xpress Books File
.QXD Quark Xpress File
.QXL Quark Xpress Element Library
.QXT Quark Xpress Template File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.R Pegasus Mail Resource File
Rebol Script
Progress Compiled Program File
Ratfor FORTRAN Preprocessor File [FORTRAN]
.R?? RAR Compressed File (?? can be 00 to 99)
.R1A Yamaha RM1x Dance-Music Workstation
.R2A Yamaha RS7000 Music Production Studio Sequencer
.R2D RISA-2D Simple Analysis & Design
.R2K Repertoire 2000 Music Database
.R2P Yamaha RS7000 Music Production Studio Sequencer
.R33 Train Simulator Game File
.R3A Yamaha RS7000 Music Production Studio Sequencer
.R3D RISA-3D 3D Analysis & Design
.R3P Yamaha RS7000 Music Production Studio Sequencer
.R64 Top Secret Crypto Gold File
.R8 RAW Graphic File
Flight Simulator Texture File
.R8L LaserJet Landscape Font
.R8P LaserJet Portrait Font
.RA RealMedia File
.RA6 ReliaSoft ALTA 6 (Accelerated Life Testing Analysis Software)
.RAD Radiance Scene Description Format [XnView]
.RAI SPEFO Stellar Spectra Analysis File
.RAM RealMedia Metafile
.RAN Dexterpen File (Parametric 2D design and calculation)
.RAP Rapanalyst File (Rapid Application Predictive Technology Organization Resource)
Rapidocs Document
.RAR RAR Compressed Archive
Java JCA Resource Adapter Module
.RAS Sun Raster Graphic [XnView]
Cals Raster File [SwiftView]
Max Payne Data File
Sky Subtracted Data
.RAST Sun Raster Graphic [XnView]
.RAT Rating System File
Rats Data
Nimbus 7 SAMS Data File (radiance data)
.RAW RAW RGB 24-bit Graphic [XnView]
Raw Signed PCM Data
Sentry 2020 Encryption File
VitaGraph File (medical testing related)
Nimbus 7 SAMS Data File (radiance data)
HSI Raw File [XnView]
Spectrum Raw Memory Dump
V41/eV41 Program Files
.RAX Image File
.RB RocketEdition File
Ruby Interpreter Program
.RB1 R:Base Data File
.RB2 R:Base Data File
.RB3 R:Base Data File
.RB4 R:Base Data File
.RBB Top Secret Crypto Gold File
.RBF R:Base Data File
Oracle Backup File
MS Rollback File (backup of existing file stored in hidden config.msi directory)
.RBH RoboHelp Configuration
.RBM Propellerhead ReBirth Modulation v2.0
Rail Baron Player Map
.RBN Richard's Bridge Notation
Real Sound File
.RBO Sometimes associated with the Magistr.B Worm [Worm Info]
.RBPM POrtable Bitmap [XnView]
.RBS Propellerhead Software ReBirth Song
Rutherford Backscattering Spectroscopy Analysis Package (RUMP)
MS Rollback Script (see .RBF)
.RBX XStream Multimedia Simulation Format
.RBZ Rail Baron Player Saved Game
.RC Borland C++ Resource Compiler Script File
Emacs Configuration
.RC2 ReCycle v.2 Audio Loop
.RCD PC Anywhere Recorded Session File
.RCG Netscape Newsgroup File
.RCH SWAT Reach Output File (river basin scale model)
.RCI SPEFO Stellar Spectra Analysis File
.RCM Logos Library System 2.x Verse Map
.RCP Recomposer's MIDI Sequencer Music File
.RCS Colin McRae Rally Save Game File (unverified)
.RCX Lego Mindstorms Robotics Invention System
.RCY ReCycled Audio Loop
.RD Philips Raw Data (crystalography related)
.RD1 Descent1 Registered Level File
DATAIR Retirement Document System Data File
.RD2 DATAIR Retirement Document System Custom Text File
.RD3 Ray Dream Designer Graphics
CorelDream 3D
.RD4 Ray Dream Designer Graphics
.RD5 Ray Dream Designer Graphics
.RDA Oracle Storage Area File
.RDB TrueVector Rules Database
ZoneAlarm Rules Database (IAMDB.RDB file)
Gear CD Suite File
Oracle Database Root File
Wavelet Image Recording (often found with .60D file)
.RDD ReliaSoft ALTA 6 & Weibull++ 6 (ReliaSoft's Reliability Software)
.RDF Resource Description Framework File
Geoworks UI Compiler Source Code
Chromeleon Report Definition
Workshare Synergy Collaboration Response File
Burli Newsroom System File
Oracle Report Binary Source
Rate Description File (BLDRATE.EXE output)
.RDI Device-independent Bitmap
SPEFO Stellar Spectra Analysis File
.RDL Descent Registered Level
RadioDestiny Radio Stream
Symbian Recogniser Library (allows OS to recognize document formats)
.RDP Remote Desktop Connection
.RDS Ray Dream Studio File
.RDT RDT Tracking File (capture design process and manage the system requirements)
.RDX Reflex Data File
.RDZ RemoteDocs File
Mandrake Linux Install File
.REC Sprint Record File
EpiInfo Data
Windows Recorder Macro
RapidComm Voice File
.RED Calrion Modula-2 Path Data
.REF Cross Reference
.REG Registration Data (various)
.REGET ReGet Deluxe Downloader
.REL Nokia Audio File
.REM Annotation (remark)
.REP Text Document
Report File (various)
Blizzard Entertainment Replay File
Qwk Reader Reply
.REQ Request
.RES Resource File (various programs)
Championship Bass Archive [Dragon UnPACKer]
Evil Islands Archive [Dragon UnPACKer]
Half Life Game Map [Maps] [Viewers]
.RESX MS .NET XML Resource Template
.REV Geoworks Revision File
Workshare Synergy File
WinRAR Recovery Volume File
.REX REXX Program File
Oracle Report Definition
ReCycled Audio Loop Export File
4D Database Windows Client Local File
.REZ Resource File
Aliens and Predator 2 Game File
Blood 2 Archive [Dragon UnPACKer]
No One Lives for Ever Archive [Dragon UnPACKer]
Sanity: Aiken's Artifact Archive [Dragon UnPACKer]
Shogo Archive [Dragon UnPACKer]
Resume Divider (split and combine large files) (Link is to Japanese site)
.RF Sun Raster Graphic
RealFlash Clip
.RF? SmartWare Compiled Project File (requires login)
.RFB RoboForm
.RFD RecogniFORM Form Definition
Emperor: Battle for Dune Archive [Dragon UnPACKer]
.RFF Maggi Graphic File
.RFG RFG Integrator System Database
.RFH RFG Integrator Householding Database
Maxagrid CTM Refresh File (text format)
.RFI SPEFO Stellar Spectra Analysis File
.RFL RISAFloor Analysis & Design
Reason Sound File
Guardian Database Roll-forward File
.RFP AI RoboForm Passcard Database
.RFT IBM DisplayWrite Revisable Format Text
AI RoboForm Form Database
.RGB Q0 Graphic [XnView]
Silicon Graphics RGB [XnView]
.RGBA Silicon Graphics RGB [XnView]
.RGI RealArcade Game Installer (not secured)
.RGL Scarlett Expert System Compiler Rules File (Scarlett is not presently available)
.RGN Championship Manager Game File
.RGP RealArcade Game Package
.RGS RealArcade Game Installer (secured)
.RGX ReaGeniX Code Generator Symbol Table
.RH Borland C++ Resource Header File
.RHP Rhino Layer Dialog
.RI Lotus File
.RIA Alpharel Group IV Raster Graphics File
.RIB 3D Reality Renderman Format Graphics
.RIC Ricoh FAX Graphic File
.RIF Fractal Painter Bitmap
Raster Image File Format
.RIFF Raster Image File Format
.RIN RappInfo PostScript Converter Configuration File
.RIP Remote Imaging Protocol
.RIT Velrita Document File (DOS word processing)
.RIV CRiSP Harvest File
.RIX ColorRIX VGA Paint File [XnView]
RIX Virtual Screen
.RKV RKIVE Compressed Archive
.RL The 7th Guest Archive [Dragon UnPACKer]
.RL1 Descent1 Registered Level File
.RL2 Descent2 Registered Level
.RL4 Bitmap Graphics
.RL8 Bitmap Graphics
.RLA Advanced Visualizer File
Wavefront Raster Image
.RLB Harvard Graphic File (Harvard Graphics taken over by Serif)
.RLC Image Systems CAD Overlay (RLC2 Graphic) [XnView]
Scanner One-bit/pixel Grahpic Output
ArcView Image File (run-length coding)
.RLE Graphic (Run Length Encoded) [XnView]
Utah Raster Image [XnView]
.RLG ReliaSoft ALTA 6 & Weibull++ 6 (ReliaSoft's Reliability Software)
.RLT ReliaSoft BlockSim & Weibull++ 6 (ReliaSoft's Reliability Software)
.RLW ReliaSoft ALTA 6 & BlockSim & Weibull++ 6 (ReliaSoft's Reliability Software)
.RLZ Realizer Source Code
.RM RealMedia File
.RMC RMCalc (restraint moments in precast prestressed concrete girder bridges)
.RMD RegMaid Document
.RMF Rich Map Format (3D Games)
Acrobat File
.RMI MIDI File
.RMJ Real Jukebox File
.RMK Clipper RMake Make File
.RML Redline Markup Language File (XML-based exchange of design markup and redline information)
.RMM RealPlayer File
.RMR Resume Maker File
.RMS AutoCAD Data File for Boss RMS (River Modelling System)
Secure RealMedia File
.RMVB RealVideo Variable Bit Rate File
.RMX RealJukeBox MP3 File
.RN Nota Bene XPL Program
.RND AutoCAD Rendering Slide
AutoShade Format
.RNG Nokia Ringtone File
Top Secret Crypto Gold File
.RNL GTX Runlength Raster Graphics
.RNO VAX Runoff File
.RNS Renoise Professional Music Tracker
.RNX RealPlayer File
.ROF ReliaSoft RG (Reliability Growth Analysis Software)
.ROI Actuate ReportBlast File
.ROL Adlib Music File
.ROM Nintento 64® Emulation ROM Image
(actually most any emulator or BIOS flasher)
MZ700 Emulator (MZ700.ROM)
.ROQ Medal of Honor - Allied Assualt
.ROV Rescue Rover Data
.ROX Actuate ReportBlast File
.RP RealPix Clip
Rainbow Painter [XnView]
.RP? RescuePro Physician Invoice File (? can be 0-9)
.RPB Automotive Diagnostic File
.RPBM Portable Image [XnView]
.RPC Rich Photorealistic Content (ArchVision, Inc.) [Info]
.RPD Rapidfile Database
RPV Printing System File
RosaPro File (Timetable schedules)
.RPGM Portable Greyscale [XnView]
.RPIN Adobe InDesign Import/Export Filter
.RPJ Relex (Reliability Analysis Software)
.RPK Rippack File
RadLight Skin
.RPL Replica Text File
.RPM RedHat Package Manager (Linux Library)
RealMedia Player File
RunPaint Multicolor Graphic [XnView]
.RPNM Portable Image [XnView]
.RPPM Portable Image [XnView]
.RPS Propellerhead Software Reason Song
.RPT Report (various)
MicroSim PCBoard Reports Reflecting Autorouting Progress and Statistics
.RPV Real Player Visualization File (animated effects to beat of music)
RPV Printing System File
Rebel Poker Player File (Note: Strip poker with nude graphics)
.RPW RPWiz Project (slide show development)
.RPY Star Wars - Tie Fighter Media
Grand Prix Legends Racing Simulation Game File
.RQY MS Excel OLE DB Query File [Buy Office XP at Shop.Microsoft]
.RR Railroad Tycoon
.RRD ERDAS Imagine File (remote sensing)
.RRI SPEFO Stellar Spectra Analysis File
.RRS Road Rash Save File
.RS Amiga Reassembler Resource Data File
EROSION 3D Event File [Format (pdf)]
Sun Raster Graphic [XnView]
.RS_ Macintosh File Resource Fork
ArcView Image File (raster snapshot | Sun rasterfile)
.RSB Rogue Spear Bitmap
Red Storm Image Format [XnView]
ReliaSoft BlockSim (System Reliability Software)
.RSC Resource File
SymbianOS Application Resource File (application resources)
.RSD Roland Visual MT File (music tutor)
.RSF Mediafour MacDrive Macintosh Resource Fork
ReliaSoft BlockSim (System Reliability Software)
.RSL PC Tools Resources Library
Borland's Paradox 7 Report
Adobe Pagemaker File
ReliaSoft ALTA 6 (Accelerated Life Testing Analysis Software)
.RSM RuneSword II Game
Resume (often an MS Word file)
WinWay Deluxe Resume File
ReliaSoft MPC 3 (MSG-3 Aircraft Maintenance Program Software)
.RSML Real Player File
.RSN Propellerhead Reason Audio File
.RSP Responce Text File
MS ODBC Driver Configuration File (Installation direcives used setting up MS Universal Data Access services)
Rockwell Software Logix 5 File
Workshare Synergy Response File
MDaemon File
ReliaSoft BlockSim (System Reliability Software)
.RSR 4D Database Resource Fork File (.4D? for data fork)
.RSS Rockwell Logix 500 SLC-5 Software
ReliaSoft BlockSim (System Reliability Software)
.RST ANSYS Results
ReliaSoft BlockSim (System Reliability Software)
.RSW ReliaSoft BlockSim (System Reliability Software)
.RT Real Media File
.RTA RoboHelp Configuration
.RTE MicroSim PCBoard Routes Established By a Successfully Completed Autorouting Run
.RTF Rich Text Format File (also used as Windows Help file script)
.RTH ANSYS Results
.RTK RoboHelp Configuration
.RTL Text File
NU 7.0 Runtime Library
.RTM Real Tracker Music Module
ReliaSoft RG (Reliability Growth Analysis Software)
.RTP TurboTax Update File
RTPatch Update Package
Gerber Sign-making Software File
.RTS RoboHelp Configuration
RealAudio RTSL Document
Realizer Runtime Library
.RTX Reliacast Audience Manager Turnstile
Mobile Phone Ringtone (extended ringtone format)
.RUI SPEFO Stellar Spectra Analysis File
.RUJ Oracle Recovery-Unit Journal
.RUL InstallShield
.RUN PC Tools Script Tools Program
.RV RealVideo Clip
SPEFO Stellar Spectra Analysis File
.RVB Rhino Script File
.RVG Revit External Group File
.RVI Revenant Archive [Dragon UnPACKer]
.RVM Revenant Archive [Dragon UnPACKer]
.RVN Riven Saved Game
.RVP Microsoft Scan Configuration File
C|Net CatchUp File Mime Type: application/x-mss-scancfg
.RVR SPEFO Stellar Spectra Analysis File
.RVS Revenant Archive [Dragon UnPACKer]
.RVT Apache Rivet Tcl File
IEX Workforce Management Report (text file)
Incite Media Assistant File
Revit Design Setup File
VersaPro Reference View Table
.RVW Review (may just be text file)
.RW6 ReliaSoft Weibull++ 6 (Life Data Analysis Software)
.RWA ReliaSoft Weibull++ 6 (Life Data Analysis Software)
.RWD Symphonie Raw Wind Data
.RWG Random Word Generator
.RWMT ReliaSoft Weibull++ 6 MT (Machine Tool Industry Life Data Analysis Software)
.RWP IBM Configurator Report (if you don't have the program ask the sender to export to .RTF for you)
MENSI Realworks Survey (3D pointcloud analysis)
.RWS Borland C++ Resource Workshop Data File
MENSI Realworks Survey (3D pointcloud analysis)
.RWX RenderWare Script
.RWZ MS Outlook Rules Wizard File
.RX Reflex Database Driver
EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.RXC WRQ Reflection X Connection
.RXD Reflex Database
.RXF Recipe Exchange Format (Resort Software format for chef/food & beverage manager data exchange)
.RXH Reflex Database Help File
.RXN MDL RxnFile (MIME type chemical/x-mdl-rxnfile)
.RXR Reflex Database Report
.RXS Reflex Database Screen Driver
.RZR in-sync Speed Razor Project File
.RZX in-sync Speed Razor Project File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.S Assembler Source Code
Scheme Source Code
.S$$ Temporary Sort File
.S$N Mindstore Digital Wallet File (M$A$W$.S$N)
.S?? RAR Compressed File (?? can be 01 to 99 after .R99)
.S01 WordPerfect Distribution File
.S02 WordPerfect Distribution File
.S03 WordPerfect Distribution File
.S16 Sigames File
.S17 SubSeven Saved Settings File
.S19 Motorola Assembly-Language Program ASCII-HEX Data File
.S28 Genesis or Sega32X Rom Image
.S2P Sonnet File
.S3D EverQuest File
Strata 3D (3D modeling/animation)
.S3I ScreamTracker v3 Instrument
.S3M ScreamTracker v3 Sound File
.S4T Patent Application Specification Authoring Tool (PASAT) File
.S4W Patent Application Specification Authoring Tool (PASAT) File
.S7P SubSeven Trojan File
.S8 Simul8 Simulation
.SA1 Panasonic e-wear MP3 Player File
.SA4 STABCAL (stability calculation for aqueous systems) File
.SA8 Street Atlas File
.SAB ModelMaker File (3D scanner)
.SAC Adobe Shared Asset Catalog
.SAD Serveron Analyzer Data File
Electronic Arts Black & White Game Sound File [Dragon UnPACKer]
.SAF MusicMatch Jukebox Secure Audio File
.SAH SETI@Home Data File
.SAK Software Administration Kit (Customer Tracking for Shareware Authors)
.SAL Soritec Data
.SAM Ami Pro Text File
Map File (HOSTS.SAM - Maps IP addresses to machine names)
Signed 8-bit Sample Data
CalTech PaleoMag Data File
.SAN The Curse of Monkey Island Movie File
Legacy of Kain Series Game File
.SAR Phoenix Server Applications Standard Distribution Format (.JAR file in special directory)
Sons Of The American Revolution Family Tree Creator Data
Saracen Paint [XnView]
.SAS SAS System File (statistical anaysis)
.SAT ACIS Solid Model (any ACIS-based CAD program)
.SAV Backup
Saved File (various)
Saved Configuration Info (various)
.SB Audio File
Raw Signed Byte (8-bit) Data
.SBD Storyboard Editor Storyboard
.SBF Superbase 95 File
.SBI Sound Blaster Instrument File
.SBK Emu SoundFont v1.x Bank Files
Superbase 95 File
Creative Labs SB AWE 32
Statfoot32 Soccer League Tracking File
SWiSH Backup File (Flash animation)
.SBL Shockwave Flash Object
Softbridge Basic Language
.SBM Hello Network HelloCombined Media Player (MultiPlatform Streaming Media Player)
.SBN ArcView Spatial Index For Read-Write Shapefiles (GIS-related)
.SBP Superbase DML Program
Scratchboard
SetupBuilder Professional Projects File
.SBR Source Browser Support File
.SBS SWAT HRU Output File (river basin scale model)
.SBT Superbase Record Notes
.SBW Savings Bonds Wizard (U.S. Treasury program)
.SBX ArcView Spatial Index For Read-Write Shapefiles (GIS-related)
.SC Framework Screen Driver
Paradox Source Code
Ingres Embedded SQL/C Source File
.SC? ColoRIX Image (? can vary) [XnView]
.SC2 Sample Cell
SimCity 2000 City
II PC Instrument
Schedule+ File
SAS Catalog
MSX 2 Screen [XnView]
.SC3 Harvard Screen Driver (Harvard Graphics taken over by Serif)
SimCity 3000 File
dBase Screen Mask File
.SC4 RollerCoaster Tycoon Scenario
Creative NOMAD MP3 Manager
.SCA SCA Datafile
Scala InfoChannel Script
Norton Anti-Virus File
.SCANNER Scanner Output File (usually a bitmap image) - Note: I've had reports of this but cannot confirm
.SCB Scala InfoChannel Published Script
System Cleaner
.SCC Text File
Stamp Collector's Girl Friday Catalog File
Source Safe File
.SCD Graphic (SCODL Scan Conversion Object Description Language)
Schedule+ File
TurboTax Schedule File
.SCE SoftCuisine Data Exchange File
.SCF Windows Explorer Command
Symphony Spell Checker Configuration
Photo Soap2 File
ScoreMaker Multimedia Show
.SCG Septerra Core Saved Game
.SCH Schedule+ File
EAGLE Schematic File
OrCad Schematics File
P-CAD Schematic File
Xlinix Foundation Schematic
XML Schema
.SCI ScanVec Inspire File
ColoRIX Image [XnView]
SciFax FAX [XnView]
System Configuration Data
.SCL SCALA Scale
.SCM SchematicMaker (Topanga Software) File
ICQ Sound Compressed Sound Scheme
Scheme Program
ScreenCam Movie
Starcraft Map File
.SCN Compressed Screen format
TrueSpace2 Scene
Pinnacle Studio Scene File (Info about scenes found in same-named .AVI)
Scenario File For Many Games Including: Age of Empires, Age of Empires: Rise of Rome,
Seven Kingdoms, SimCity Classic, SimCity 2000, SimCity 3000, SimCity 3000 Unlimited
.SCO High Score (various)
ObjectJ AuthorJ Saved Lesson
.SCP Script (various)
.SCR Faxview Fax
Screen Saver
Procomm Plus Screen Snapshot File
Script (various)
DOS DEBUG Input File (can be any extension but often .SCR)
LocoScript Screen Font File
Statistica Scrollsheet
Movie Master Screenplay (DOS software replaced by Hollywood Screenplay)
Sun Raster Graphic [XnView]
.SCS StuffIt Saved Criteria
OzWin CompuServe E-mail/Forum Access SYSOP File
Samsung Q105 Phone Screen Saver
Omron CX-Supervisor (Factory Automation)
.SCT Foxpro Screen
PC Tools Script Tools
Scitex Continuous Tone Bitmap [XnView]
SAS Catalog
OzWin CompuServe E-mail/Forum Access Forum Section Names
Windows Script Component
Lotus Screen Capture Text
.SCV ScanVec CASmate File
.SCW Score Writer Document (music score)
.SCX MS FoxPro Screen File
ColorIRX Image File [XnView]
Stanford Chart
Starcraft Map File
.SCY ReaGeniX Security File
.SD Sound Designer I Audio
.SD0 Dali Raw File [XnView]
.SD1 Dali Raw File [XnView]
.SD2 Sound Designer II Flattened File
Sound Designer II Data Fork
SAS Database
Dali Raw File [XnView]
.SD7 Daktronics Venus 7000 Electronic Sign Schedule
.SD! OzWin CompuServe E-mail/Forum Access Custom Messsage Search Online
.SDA StarOffice Drawing
OpenOffice.org Drawing
Fidonet Software Distribution Network Archive Description
SoftCuisine Data Archive
PGP Encrypted Executable
.SDB Simply Accounting File
Group Mail Subscriber Plug-in File
MS Win2000 Security Configuration and Analysis Database
STRIP SDB Utility File
.SDC StarOffice Spreadsheet
OpenOffice.org Spreadsheet
.SDD StarOffice Presentation
OpenOffice.org Presentation
.SDF Standard Data Format
Standart-Delay-Format (Chip design gatelevel-delay data exchange...
e.g., Synopys to Modelsim)
Schedule Data File
System File Format
Autodesk MapGuide Spatial Data Files
.SDG Star Office Gallery [XnView]
.SDI Fidonet Software Distribution Network Info
.SDK Roland S-series Floppy Disk Image
Autosketch Drawing
.SDL SmartDraw Library
OzWin CompuServe E-mail/Forum Access Custom Messsage Search
.SDN Shell Archive
Fidonet Software Distribution Network Compressed Archive
.SDOC Sealed Word File [Unsealer]
.SDP QuickTime Session Description Protocol File (resides on server; contains info about format, timing, & authorship of streamed media)
Real Player File
StarOffice Picture File
.SDR SmartDraw Drawing
.SDS StarOffice Chart
OpenOffice.org Chart
Raw Midi Sample Dump Standard File
.SDT SmartDraw Template
Dungeon Keeper 2 Archive [Dragon UnPACKer]
Theme Park World Archive [Dragon UnPACKer]
.SDV Semicolon Divided Values File
.SDW StarOffice Text
OpenOffice.org Text Document
Raw Signed DWord (32-bit) Data
Lotus WordPro Graphic
.SDX Midi Sample Dump Standard Files Compacted by SDX
.SDV Pinnacle Studio DV Video Editing Project
.SE ScopeEdit Project File
.SEA Macintosh Compressed Archive File [StuffIt]
.SEB Franklin eBookMan Format
.SEC Compressed Archive File
Disney Animation Studio Secured Animation File
PGP Secret Key Ring
MP3 Music File (unverified)
.SEE LISCAD Plus File
.SEF Steganos Encrypted File
.SEG Compressed File Segment
.SEL PaintShop Pro Selection File
.SEM ZX Spectrum-Emulator Snapshot
.SEO ScopeEdit Object File
.SEP TIFF Bitmap Separation
.SEQ Atari Animation File
TestStand Sequence File
Bubble Chamber Sequential Instruction File
Chromeleon Sequence List
LifeForm File
Stad File [XnView]
Power Tracks Pro Music Sequencer File
.SEQU Acrobat Sequence File
.SES Digital Audio Editor File
Clarion Modula-2 Session Data
Hummingbird Exceed X-Session
Shadow Security Scanner Session
.SET Driver Set
Image Settings
Backup File Set
Configuration (various)
.SEU Serials 2000 Encrypted S2K Update
.SEW Janome (New Home) Sewing Machine File
Embroidery Design File [possibly read with Melco Sizer Software]
.SEX Urban Chaos Game File
.SF Sound File [Linux Player]
OS/2 WPS Attribute Storage
IRCAM SoundFile
Powerhouse Subfile Data File (contents defined by .SFD dictionary)
.SF2 Emu SoundFont v2.0 File
Creative Labs Soundfont 2.0 Bank File
.SFA Sonic Foundry Video Editor Audio File
.SFB STRIP SDB Utility Backup File
.SFC Snes9x (freeware Super Nintendo Entertainment System (SNES) emulator)
.SFD SoundStage Sound File Data
Powerhouse Subfile Dictionary (describes .SF file contents)
.SFE Split Files Shell Extension
.SFF Fritz Fax-Print File
Stage Scene File
Structured Fax Format [XnView]
.SFI Ventura Printer Font
SoundStage Sound File Info
SIS Framegrabber Graphics
.SFK Sound Forge Peak Data File
.SFL Ventura Printer Font
LaserJet Landscape Font
.SFM DART Pro 98 Soundtree Structure
.SFN SPX Font
.SFP Ventura Printer Font
LaserJet Portrait Font
.SFR Sonic Foundry Sample Resource
.SFS StarOffice Frame
OpenOffice.org Frame
PCL 5 Scalable Font
.SFT Chiwriter Screen Font
.SFV QuickSFV/WinSFV Checksum File
Easy SFV Creator
fsum (free command line checksum file creator/verifier)
.SFW Seattle Film Works File (Actually MGI PhotoSuite File) [Filmworks Viewer] [XnView]
.SFX Self-extracting Archive
.SG ABC Snap Graphics User File
.SG1 Stanford Graphics
.SGA SEG-A Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey]
.SGB SEG-B Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey]
.SGC SEG-C Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey]
.SGD SameGame Data File
SEG-D Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey]
.SGF Smart Game Format
StarWriter Document
Sonique Document with Graphics
.SGI Silicon Graphics IRIS Graphic File [XnView]
.SGIF Sealed GIF File [Unsealer]
.SGL StarOffice Master Document
OpenOffice.org Master Document
.SGM SoftQuad XMetaL File
.SGN Sierra Print Artist Sign
.SGO SansGUI Object Library File (compiled class definitions and objects for building models)
.SGP Statgraphics Plus Statistics
SansGUI Project Model File (model configurations and input parameters defined by simulation users for simulation runs)
Acoustica MP3 Audio Mixer File
.SGS SansGUI Schema Definition File (class schemas defined for a simulator)
.SGT Hitman Game Sound File
DirectMusic Producer
Signature Keyboard Macro
.SGU GJDV Word Processor Keyboard Definition File
Band-in-a-Box File
.SGW Settler GOLD for Windows Data File
.SGY SEG-Y Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey]
.SH UNIX shar Archive File
UNIX/LINUX Shell Script
.SH3 Harvard Presentation (Harvard Graphics taken over by Serif)
.SHADER Script File for Game Textures (ASCII file--but, it's easier if you use Photoshop)
.SHB Corel Background File
Document Shortcut File
.SHD Print Spooler Shadow File
ArcView ARC/INFO Shadeset Symbol File
.SHE Medusa CAD File [Outdated. Medusa CAD sold by PTC to CAD Schroer.]
.SHG Hotspot Editor Hypergraphic
.SHIFTS ARIA PIPP Chemical Shifts File
.SHK Apple II Compressed Archive File
.SHM WordPerfect Shell Macro
.SHN Shorten Audio Compression File [Additional]
.SHP 3D Studio Shapes File
GIS Software Geographic Shape File [GIS info]
(ArcView, et.al.) (JShape/FShape)
3D Modeling File (various)
.SHR UNIX shar Archive File
.SHS Shell Scrap Object File
.SHTM HTML File Containing Server Side Directives
.SHTML HTML File Containing Server Side Directives
.SHW Corel Presentation
WordPerfect Slide Show
Show File
.SHX AutoCAD Shape Entities
GIS Software Geographic Shape Index File [GIS info]
(ArcView, et.al.) (JShape/FShape)
.SI SoftImage Image File [XnView]
.SIB Sibelius Music File
.SID Commodore64 Music File [Player] MIME type: audio/prs.sid
LizardTech MrSID Photo [Free plug-in viewer]
.SIF Windows NT Setup File
Autodesk Spatial Index File
.SIG Signature File
Print Shop Sign File
.SIK Backup File
.SIM Simulation (various) (e.g. Setup for Nascar4)
Aurora [XnView]
PowerDVD File (powerdvd.sim)
PC Finder 2002C (Trace stolen computers)
.SIR SIR (Scientific Information Retrieval) Database (ver 1-3)
BYU SIR [XnView]
Solitaire Image Recorder [XnView]
.SIS SymbianOS Installer File (application installation archive)
.SIT StuffIt Compressed Archive File (Multiple platforms)
Sinclair Snapshot
.SITHQX StuffIt Compressed Archive File (Multiple platforms)
.SIV ShopCalc Pro File (Cabinet Door & Drawer Cutting List Calculator Invoice)
.SIX SIXEL Graphic
.SIXEL SIXEL Graphic
.SIZ Oracle 7 Configuration
.SJ1 Sega SJ-1 DIGIO [XnView]
.SJF Split Files Shell Extension
.SJPG Sealed JPEG File [Unsealer]
.SJX Seljax Estimating and 3D Design
.SKA PGP Secret Keyring
.SKB QuickPOS (Point-Of-Sale) Standard Keyboard Layout File
.SKCARD Sidekick File (now a discoutinued product of Starfish which maintains a FAQ)
.SKD WinOrbit File
AutoSketch File
VEX Format File
Max Payne Model File
.SKF Autosketch
.SKL Authorware Resource
.SKN FileWrangler/SecurDesk!/ImageForge Graphic Skin
eRocket eBook Skin
The Sims (Maxis) 3D Body Mesh Skin Data
Skantek [XnView]
.SKR Microsoft ScriptIt
.SKY ActiveSky Movie Clips for Palm OS
.SKZ coverXP Skin File
.SL S-Lang Program File
PACT's Save Layout
EROSION 3D Soil Parameters [Format (pdf)]
.SLB AutoCAD Slide Library
.SLC Telix Compiler SALT Script
.SLD AutoCAD Slide
STABCAL (stability calculation for aqueous systems) File
.SLDASM Solidworks Assembly File
.SLDDRW Solidworks File
.SLDLFP Solidworks File
.SLDPRT Solidworks File
.SLF Shopcalc List File (Cabinet Door & Drawer Cutting List Calculator)
Suppose Stand List File
SLIDE: Scene Language for Interactive Dynamic Environments File
SuperLink Folder Manager for Readers
Mail Warden
Segment Layout File (IMS Database related)
SortWizard Export Format
.SLG Chromeleon Audit Trail
.SLI MagiCorp Side Service Slide
.SLK Data Exchange File (Symbolic Link - Often used by Excel)
Timeslips Lock File
.SLL Sound File
.SLM Microsoft Visual FoxPro
.SLN MS Visual Studio Solution
.SLP Timeslips Data File
.SLT Telix SALT Script Application
Super Level Loader Snapshot [Format]
.SLW Settler LITE for Windows Data File
.SLY Parts of a Lilypond Guitar File (ASCII text)
.SM Smalltalk Program File
SoftSpoken Mailer Mailing List
ScriptMaker Script
Simentor Data File
Samna Word Text File
.SM3 DataCAD Symbol File
.SMC Super Nintendo Game-console ROM Image [See ZNES or SNES9x]
.SMCL Stata Saved Formatted Logs
.SMD StarOffice Mail
OpenOffice.org Mail Document
Sega Genesis/Mega Drive Emulator
Polyphonic Ringtone File for Phones
.SMF StarOffice Formula
OpenOffice.org Formula
Smartfax Fax
.SMHT Sealed MHT Archive [Unsealer]
.SMI RealPlay SMIL File
Self Mounting Image File (Apple Macintosh)
.SMIL Synchronized Multimedia Integration Language [RealPlay]
.SMK Smacker Compressed File
.SML Simple Markup Language
.SMM Ami Pro Macro
.SMOV Sealed QuickTime Movie File [Unsealer]
.SMP Sample or Samplevision Format
Sound File [Linux Player]
Ad Lib Gold Sample
PhotoImpact Gallery File
.SMP3 Sealed MP3 File [Unsealer]
.SMPEG Sealed MPEG Movie [Unsealer]
.SMPG Sealed MPG Movie [Unsealer]
.SMRD Adobe InDesign Import/Export Filter
.SMS MS Package Definition File (used now in place of .PDF)
Sega Master System Emulator
.SMT HiPer-Six Memo File
SmartWare II Text File
Creator Simulation Symbol File
.SMWT Adobe InDesign Import/Export Filter
.SMX Statistica Matrix Spreadsheet
.SNA Mirage Microdrive Snapshot [Format]
.SNAP Mirage Microdrive Snapshot [Format]
.SNAPSHOT Mirage Microdrive Snapshot [Format]
.SNB SigmaStat File
.SNC Act! Modem Sync File
.SND Sound Clip
Raw Unsigned PCM Data
AKAI MPC-series Sample
NeXT Sound
Macintosh Sound Resource
Heroes of Might & Magic 3 Archive [Dragon UnPACKer]
.SNES Super Nintendo Game File (unverified)
.SNG Midisoft Studio MIDI Song
.SNI MDK Archive [Dragon UnPACKer]
.SNK Strong Name Key File (part of the .NET architecture)
.SNM Netscape Mail
.SNO SNOBOL Program File
Siege Editor Node
.SNP Snapview Shapshot
MS Access Snapshop [Viewer] (page of Access report preserves layout, etc.)
CoffeeCup HTML Editor Snippet
Computer Eyes Video Output
.SNT MS Sticky Notes (accessory for Windows XP tablet PC edition - due end 2002)
.SNX Second Nature Software Graphic
Mirage Microdrive Snapshot Extended Version
StarCraft Saved File
.SO Oberlin DRAGN Graph Algorithm
UNIX Shared Library Function (similar to .DLL file)
.SOA Sage MAS 90 Accounting Software File
.SOC SociometryPlus Sociometric Group
.SOD Star Trek Armada 3D Image File
.SOE Shadows of the Empire
.SOI MENSI 3D Laser Enhanced 3D Scanner File
.SOL Game Solution (various games)
.SOM Paradox Sort Info
Quattro Pro Network Serial Numbers
.SOU SB Studio II Sound
.SP Splint Compressed Archive File (UNIX)
VgaSpec/Spectrum Snapshot [Format]
.SPA SmartPA Saved Capture File
Thermo Nicolet OMNIC File
Smart Protocol Analyzer Real Time Communication Data
.SPC Multiplan Program
WordPerfect Temp File
Interact Shark Port Code Save (SharkPort=code/game save xfer kit for PlayStation 2)
SNES Audio file
PKCS #7 Certificate
Spectrum 512 Compressed File [XnView]
.SPD Harvard Bitstream Typefaces (Harvard Graphics taken over by Serif)
PostScript Printer
Mini-driver
Speech Data File
Speedo Scalable Font
.SPDF Sealed PDF File [Unsealer]
.SPF Site Publisher Profile
EnerGraphics Slide Presentation
.SPG Sprint Glossary
.SPH SDR99 Speech Recognition Task SPHERE Waveform
.SPI Scanner Graphics
.SPJ Site Publisher Project File
.SPL Compressed Archive File
Printer Spool File [MS Knowledgebase Article]
Sprint Printer Driver
Sample File
Spell Checker
Digitrakker Sample (by n-FaCToR)
Shockwave Flash Object
Split Files Shell Extension
Infinity Engine Game Spell
.SPM WordPerfect File
.SPN WordPerfect Distribution File
.SPNG Sealed PNG Graphic [Unsealer]
.SPO SPSS Statistical Program
.SPP Sprint Printer File
Serif PhotoPlus Native Format File
.SPPT Sealed PowerPoint File [Unsealer]
.SPR Sprint Document Letter
Foxpro Generated Screen Program
Sprite
Star Trek Armada Sprite Information
.SPS Sprint Screen Driver
SharkPort File (transfers game saves from computer to PlayStation2)
VAX/VMS Source Code
Spectrum 512 Smooshed File [XnView]
.SPSS SPSS Database File [PSPP Free Version Info]
.SPT SPITBOL Program File
Liquid Audio Player Secure Portable Track File
MITAC Disk/System Management Utility Pack Support File
.SPU Spectrum 512 [XnView]
.SPW SigmaPlot Worksheet
.SPX Foxpro Compiler Screen Program
Screen Peace Extension
.SPZ Spazz3d VRML File
.SQ7 Daktronics Venus 7000 Electronic Sign Sequence
.SQB SyQuest Backup
.SQC Structured Query Language Common Code File [SQL]
.SQL Structured Query Language Data [SQL]
.SQM Operation Flashpoint Mission
.SQR Structured Query Language Program File [SQL]
.SQS Operation Flashpoint Script
.SQZ Compressed Archive File
.SR Sun Raster Graphic [XnView]
.SR1 SIR (Scientific Information Retrieval) Database
.SR2 SIR (Scientific Information Retrieval) Database
Omron CX-Supervisor (Factory Automation)
.SR3 SIR (Scientific Information Retrieval) Database
.SR4 SIR (Scientific Information Retrieval) Database
.SRB Corel ClipArt ScrapBook
.SRC Sourcecode (various)
.SRF Sun Raster Graphic File
Siebel Repository File (compiled objects)
.SRG Microsoft Software Self-Registry File (registry keys that get rewritten when software re-registers itself)
.SRI Voice It Link Compressed Voice File [Free player]
.SRM Super Nintendo ROM Saved File (saved game)
.SRP QuickLink Script
Gregg Keyboarding Configuration
.SRPM Redhat Linux RPM Source File
.SRT BSplayer Subtitle File
SDR99 Speech Recognition Task Speech Recogniser Transcript
Omron CX-Supervisor (Factory Automation)
.SRV NewsPro for Newsfeeds.com Servers Info
BNBSURVEY Configuration File (survey script for Unix and Windows Servers)
North American Locomotive Works
FBB Initialization File (bulletin board software for amateur packet-radio) (INIT.SRV)
.SS Splash Bitmap Graphic
DrScheme Programming Environment File
XShipWars Sound Scheme File
Ribbons File (protein analysis)
Oberlin DRAGN Graph Algorithm
.SSA Subtitles
.SSC HP Library and Tape Tools Script
SwordSearcher File
Scrippy File (E-mail stationary)
.SSD SAS Database
Snagit Studio Design File
.SSF Enable Spreadsheet File
.SSH2 SSH Secure Shell Client
.SSI Installer/GD Software Setup Information
SriSun [XnView]
.SSK SwordSearcher File
SmartSketch File (Use Hijaak to convert - SmartSketch became FutureSplash which became Macromedia's Flash)
.SSL Corel Flowchart Symbol Library File
.SSM RealPlay Standard Streming Metafile
.SSP SAS Transport Data
Axialis Screensaver [XnView]
.SSS Sudden Strike Saved Game
.SST Certificate Store
Sea Surface Temperature File
.SSWF Sealed Flash File [Unsealer]
.SSX ScreenShare Data File
VersaPro Smart Store Document
.SSY ScreenShare Compressed Data File (compressed .SSX file)
.ST SMALLTALK Program File
Scream Tracker Instrument Library
Atari ST Disk Image
NeoPaint Stamp File
.ST3 MIDI Karaoke File
.ST4 SBIG CCD Camera ST-4 [XnView]
.ST5 SBIG CCD Camera ST-5 [XnView]
.ST6 SBIG CCD Camera ST-6 [XnView]
.ST7 SBIG CCD Camera ST-7 [XnView]
.ST8 SBIG CCD Camera ST-8 [XnView]
.STA Eudora File
Statistica Spreadsheet
Spinmaker Plus Stack
Reflection Saved State
Brazilian MSX Emulator - BrMSX Saved State
MicroSim PCBoard Statistics Report
.STB Genus Stub Library
.STC OpenOffice.org Spreadsheet Template
.STD Prosa State Transition Diagram Graphic
SureThing CD Labeler Document File (Labels CDs, DVDs, Jewel Cases, etc.)
LocoScript Standard Script File
OpenOffice.org Drawing Template
.STE DataPerfect File
.STEALTH Likely a text file (e.g., README.STEALTH)
.STEP AP203 Step File
.STF ShrinkToFit Compressed Archive File
Setup Information
Structured File
.STG PageKeeper Storage File
MS ActiveSync (backup of data on mobile device)
Statistica Graphics File
Visual Pinball High Scores (and other data: vpreg.stg)
.STI Stickies (notes)
OpenOffice.org Presentation Template
Datastitch Embroidery Design/Editing/Lettering/Stitch Transfer
.STK Personal Stock Monitor File
CRiSP Harvest File
.STL Certificate Trust List
Macromedia Fireworks Style Library
CAD Software Solid Modeling/Prototyping File
SPEFO Stellar Spectra Analysis File
.STM Sound File
Prosa State Transition Diagram Model
Scream Tracker v2 Module
SHTML File (HTML File Containing Server Side Directives)
SDR99 Speech Recognition Task Time Segment Time Marked File
PhotoStudio Stamp [XnView]
.STML Sealed HTML File [Unsealer]
.STN STiNG File (Iterated Systems resolution-on-demand images)
ArcView Geocoding Standardization File
.STO Genus Pascal Stub OBJ File
Infinity Engine Game Storage File
.STP PageKeeper Packed Storage File
DART Pro 98 System Settings
AP203 Step File
.STR dBase Structure List
DataPerfect Structure File
Fifa 2002 Music File
Sceensaver
Statistica Report File
Stream File (Playstation Discs)
Music File
.STS MS C Project Status Info
Scream Tracker Song
Nimbus 7 SAMS Data File (status data)
MicroSim PCBoard Status of Autorouting Run
.STT Automap Template
SureThing CD Labeler User Template File
.STU Tarantella Enterprise 3 3270 Emulator Style File
xyALGEBRA File
.STV sofTV.Author File (Streaming Video Web Authoring)
.STW SmartTerm Data File
Statistica Workbook File
Neopaint Stamp [XnView]
OpenOffice.org Text Document Template
.STX Simply Tax Form
EditPlus Syntax File
SmarText E-book
SBIG CCD Camera ST-X [XnView]
Datastitch Embroidery Design/Editing/Lettering/Stitch Transfer
.STY Style Sheet (various)
MS Interactive Music Control
LaTeX2e Style
.SUB CloneCd Related File
Divx Subtitles
SubmitWolf File (search engine submission program)
.SUD Super Project Analyzer Data
.SUI Simple User Interface Toolkit Library
.SUITE Winstyles Theme (customizes the Windows Desktop)
.SUL GFA Ray-Trace [XnView]
.SUM Summary (various)
.SUMP Easy Palette Gallery or Library
.SUN Sun Raster Graphic File [XnView]
.SUNIFF Sun TAAC File [XnView]
.SUO MS Visual Studio Solution User Options
.SUP WordPerfect Supplemental Dictionary
Super Project Analyzer Project
Pro/ENGINEER Master Configuration File (CAD)
.SUR Surveyor Document
.SV$ AutoCAD Autosave File
.SV1 Transport Tycoon Saved Game [TT Info]
.SV4 RollerCoaster Tycoon Saved Game
.SVB Statistica Macro File
.SVC Statistica Macro File
.SVD Word Backup File [Buy Office XP at Shop.Microsoft]
.SVF WinSFV (Checks for damaged .rar files)
.SVG Word Backup File [Buy Office XP at Shop.Microsoft]
Scalable Vector Graphics File
Lode Runner Saved Game
.SVI Mimio Ink Files
Red Faction Game File
.SVL Scramdisk VoLume (Win98 freeware also opened by DriveCrypt)
.SVO Statistica Macro File
Transport Tycoon Custom World [TT Info]
.SVP WISCO Survey Power
SwiftView Command File
.SVQ Roland Keyboard Midi Sequence
InfoBind File Format (encryption format used in Fuji SmartMedia cards to prevent copying)
.SVS Word Backup File [Buy Office XP at Shop.Microsoft]
DART Pro 98 Spectral View Settings
.SVX Interchange File Format, 8SVX/16SV
Amiga 8SVX Sound
Statistica Macro File
.SW Audio File
Raw Signed Word (16-bit) Data
SmartWare Spreadsheet (requires login)
EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.SWA Shockwave Audio File
SATLOC FreeTrac (GPS Guidance and mapping)
.SWB PageMaker 7.0 ColorSync Component
Super Win-EBook 98 File
Sametime Whiteboard File
.SWD Storybook File (educational)
Flash MX File with Debugging Infomation
Sabiston Textbook
.SWF Macromedia Flash Format [Alternate]
Microsoft Sidewinder (Force Feedback Joysticks) Profile Activator
.SWFS Dreamweaver File
.SWG Swag Reader Packet
.SWI Swish Data File (Swish makes Flash files)
.SWK Swapkeys Keyboard File
.SWL Macromedia Flash Format [Alternate]
.SWP Sprint Backup File
Swap File
Spider Writer Project File
.SWS S-PLUS Workspace
Swift Generator Instruction File
SmartWidgets File
Screen Writer Studio File
VHDL Simili Sonata Project File
Science Workshop File
.SWS0 Screen Writer Studio File Backup
.SWT VB Setup Wizard Template File
Macromedia Authoring Flash File
Swift Generator Template File
Space Watch Pro Data File
.SWW QSE FMEA/APQP Application Database (Risk Analysis application)
.SXC OpenOffice.org Spreadsheet File
.SXD OpenOffice.org Draw File
.SXF Secure eXchange Format File (Phocis Licensing Client)
.SXG OpenOffice.org Master Document
.SXI OpenOffice.org Presentation File
.SXLS Sealed Excel File [Unsealer]
.SXM OpenOffice.org Math File (Forumla)
.SXP OpenOffice.org Presentation File
.SXW OpenOffice.org Text Document
Staroffice Word Document
.SY# Darn! Backup Files
.SY1 Ami Pro Smartpix Symbol Library
.SY3 Harvard Symbol File (Harvard Graphics taken over by Serif)
.SYD Sysedit Backup File
.SYL SYLK Spreadsheet Format
.SYM Symbol Table (various)
Borland C++ Precompiled Headers
.SYN Synonym File
TextPad Syntax Definition
SDSC Image Tool File
Breakneck / N.I.C.E.2 Archive [Dragon UnPACKer]
Excessive Speed Archive [Dragon UnPACKer]
Synthetic Universe [XnView]
.SYNU Synthetic Universe [XnView]
.SYS System Configuration
System Device Driver
.SYW Harvard Symbol Graphic (Harvard Graphics taken over by Serif)
Yamaha SY-series Wave Files
.SYX SysEx MIDI File
.SZ0 Binary File Format (used when uploading via a COM port)
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.T Tads Source File
Turing Programming Language File
TAR Tape Archive Without Compression
.T_1 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library)
.T?? Ingres Table/Index File (?? = Hex 00 to FF)
RAR Compressed File (?? can be 01 to 99 after .S99)
.T1 Male MRI [XnView]
EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.T2 Male MRI [XnView]
.T2K Teach2000 Document
.T2T Sonata CAD Modelling File
.T64 C64S Emulator Program
.T98 Kiplinger Tax Cut File (1998 Tax Year)
.T99 Kiplinger Tax Cut File (1999 Tax Year)
(Note: Kiplinger Tax Cut State Return Files are of the form .T??
where ?? is the two-character state designation.)
.TAAC Sun TAAC File [XnView]
.TAB Guitar Tablature File [On-line Guitar Archive]
MapInfo Table
Diabetes Mentor File
ArcView Lookup File
.TAF Birdstep Technologies RDM Database (may be embedded in other software)
.TAG Dataflex Query Tag Name
.TARGA Truevision Targa Bitmap [XnView]
.TAH Turbo Assembler Help File
.TAI INMOS Transputer Development System Occam Analyse Info
.TAL Adobe TypeAlign Text Illustration File
Typed Assembly Language File
.TAM Tame Program Settings
.TAO IsoBuster File
.TAR Compressed Archive File
.TAX Turbotax File
.TAZ Compressed File (short for .tar.z)
.TB1 Turbo C Font
.TB2 Turbo C Font
.TBA PASSOLO Licensed Translation Bundle (Software localization: translation, etc.)
.TBALIC400 PASSOLO Translation Bundle (Software localization: translation, etc.)
.TBB The Bat! E-mail Hives
.TBC IronCAD Tool Bar Customization
Inovate Tool Bar Customization
.TBE TMPGEnc List File (video editing)
.TBF Imavox TurboFax Faxs
Trellian Button Factory File
.TBG TeamBG File (modify Infinity Engine games)
.TBI The Bat! Hive Index
.TBK Memo Backup (database programs)
Asymetrix Toolbook
The Bat! Backup Hives
.TBL Adobe Pagemaker Import Mapping Table
OS/2 Table of Values
ArcView Geocoding Support Table
.TBP TAS Books Accounts
.TBPA Tektronix Bluetooth Protocol Analyzer
.TBR SoftQuad XMetaL Toolbar/Menu Configuration
.TBT TabIt (Guitar Tablature Editor)
.TBU PASSOLO Translation Bundle (Unicode) (Software localization: translation, etc.)
.TBULIC400 PASSOLO Translation Bundle (Unicode) (Software localization: translation, etc.)
.TBX Project Scheduler Table
.TC Borland Configurations File
.TCF Theme Park World Game File
.TCH Borland Help File
.TCI INMOS Transputer Development System Occam Configuration Info
.TCL TCL/TK Language Script
TextPad Clip Library
SLIDE: Scene Language for Interactive Dynamic Environments File
.TCM INMOS Transputer Development System Occam Comment Text File
.TCT Championship Manager Game File
TurboCAD Template
.TCW TurboCAD Drawing
.TCX TurboCAD Drawing as Text
.TD Turbo Debugger Configuration File
.TD2 Turbo Debugger Configuration File
.TD4 RollerCoaster Tycoon Track Design
ThumbsPlus Version 4.x+ Graphics Database
.TDA Palm Date Book File
.TDB Thumbs Plus Database
Déjà Vu Terminology Database (translation tool)
.TDF Trace Definition File
TheDraw Font
Typeface Definition File (for fonts)
MicroSim PCBoard NC Drill Tool Definition File
.TDH Turbo Debugger Help File
.TDI Explore (TDI) & Maya [XnView]
.TDIM Digital F/X [XnView]
.TDK Turbo Debugger Keyboard Record
.TDL FOCUS Three Dimensional Look File
.TDO Compressed File
.TDP Serif DrawPlus Thumbnail
.TDS Turbo Debugger Symbol Table
.TDT Daylight Fingerprint Data File
ASCII Data File in CSV Format (various)
.TDW Turbo Debugger Configuration File
.YDX Tony Hawks Pro Skater 3 Texture File
.TDY TODAY or BuildPro Application File
.TE Textease File
.TE2 Conquest of the New World
.TEA Tea Template Source File
.TED Tribes 2 Game File
.TEE TeeChart Office Graphic
.TEF Relisys Tefax Fax
TablEdit (creating, editing, printing and listening to tablature)
.TEL Telnet Host File
.TEM Icon Author Template
Turbo Editor Macro Language
Badge Designer 2000 File
.TEMP Audiogalaxy Downloading Music File (file renamed when download complete)
.TER TerraGen Landscape File
Daylon Leveller Heightfield Data
.TET Textease Template
.TEX TeX
LaTeX File
Mackichan Scientific Notebook File
PaintShop Pro Texture [XnView]
Texture File (various) [usually a renamed .BMP file and may be in special directory]
Idealist Datasheet
Concordance Full Text Database File
.TEXT ASCII Text File (use any editor to open)
.TF Turbo Profiler Configuration File
.TFA Turbo Profiler Area File
.TFC Tobi's Floppy Cataloguer Catalog
.TFH Turbo Profiler Help File
.TFM Tagged Font Metric
TeX Font Metric File
Toplevel Form File
.TFR Star Wars - Tie Fighter Game-Pilot File
IBM Client Access File Transfer
4D Database Windows Formula Document
Time-Frequency Representation (Frequency analysis)
.TFS Turbo Profiler Statistic
.TFW Digital Raster Graphic World
ArcView World File For TIF Image
.TFX Traffix Traffic Analysis Software
.TG1 On Target Project File
.TG4 CCITT Group 4 Fax [XnView]
.TGA Truevision Targa Graphic [XnView]
(Used by some game programs -- sometimes called texture files)
.TGD Nimbus 7 SAMS Data File (gridded temperature data)
.TGH Tiliagraph File (Stratigraphic Diagram Software)
.TGH TrueGas Host File
.TGM Nem's Mega 3D Terrain Generator
.TGW Terragen Atmosphere File
.TGZ UNIX Tar File Zipped (short for .tar.gz)
.THB KinuPix Skin [XnView]
.THD Thread
.THEME Microsoft Plus! Theme File
.THM MS Clipart Gallery Database
Serif DrawPlus Theme
.THN Graphics Workshop for Windows Thumbnail
.THP TurboTax-related File
LiveMath Plug-in
TeeGofer Help Project (.NET Help author application)
.THR PROGNOSIS Threshold Document File
.THS WordPerfect Thesaurus
.THU Command and Conquer Renegade File
.TIB Acronis True Image (hard drive partition manager)
.TIC Lotto Pro 2002 Ticket
Arcinfo Coordinates File (GIS-related file)
.TIE X-wing Alliance Game File
.TIF Tagged Image Format File (also most fax files) [XnView] [SwiftView]
Digital Raster Graphic Image
.TIFF Tagged Image Format File [XnView] [SwiftView]
.TIG Tiger Government Map File
.TIK Script File for Game Textures (ASCII file)
.TIL Togai InfraLogic Fuzzy-C Knowledge Base
Buttonz & Tilez Texture [XnView]
Tilia File
.TIM Playstation Game Texture Image [XnView]
The Incredible Machine Level File
TIFF Image (rev 6) [XnView]
.TIP Startup Tip File (various)
.TIS MahJongg Tile Set
.TIX Hybrid Graphics File (both vector and raster data)
ASA for UNIX Terminfo Extension File
Tix Widgets
DivX File
.TK TK Solver File
.TK2 Take Two/Easy CD Creator Backup
.TKB TicketBench Data File (design/print tickets)
.TKM Panasonic SD Voice Editor File
.TJF VAXTPU Backup File (VAXTPU is default OpenVMS editor)
.TKN Liberty BASIC Application Distribution File
.TKT TK Solver File
.TKW TK Solver File
.TLB Remote Automation Truelib Files
OLE Type Library
Visual C++ Type Library
VAX Text Library
Bubble Chamber Reference Table
.TLC Swat Compiled Tood Command Language Source
.TLD Trellix File
.TLE NASA Two-Line Element Set
.TLF Turnpike SCORE Link File
Avant! Memory Compiler Memory Models Format File
Gear Track List File (CD burning) (Used to be .CUE; just rename .CUE to .TLF)
Short Message Service File (GSM phone messaging)
.TLG Trellix WebGem
.TLK Hand of Fate Archive [Dragon UnPACKer]
Lands of Lore Archive [Dragon UnPACKer]
.TLP MS Project Timeline File
.TLS Timeless Time & Expense
.TLT Trellix Web Design File
TList Data File
.TLX Telex
Trellix Data File
.TMA DCI TradeManager Catalog Archive
.TMB Timbuktu Pro Connection Document (remote control software)
.TMC DCI TradeManager Catalog Archive
.TMF WordPerfect Tagged Font Metric File
.TMG The Marketing Game File
.TMO Zortech C++ Global Optimizer Output File
.TMP Temporary File/Folder
.TMQ TestMaster File
.TMR Simpsons Cartoon Studio File
.TMS Telemate Script
.TN1 Tiny [XnView]
.TN2 Tiny [XnView]
.TN3 Tiny [XnView]
.TNC SuperJPG ThumbNail Cache File
.TNEF Transport Neutral Encapsulation Format File
.TNF Transport Neutral Encapsulation Format File
.TNK OMEGA Tank File (Origin Systems game no longer marketed) [Info]
Nimbus 7 SAMS Data File (pre-launch calibration data)
TrunkTrac Scanner Info
.TNL Thumbnail [XnView]
.TNY Tiny [XnView]
.TOC Eudora Table Of Contents
.TOL Kodak Photoenhancer
.TOP INMOS Transputer Development System Occam Top Level File
QuickVerse File (Bible reading program)
.TOS Atari Executable (TOS = The Operating System - Sometimes an archive)
.TOT Telelogic Option Templates
.TP Turbo Pascal Configuration File
Turbo Profiler Session-state File
EROSION 3D Relief Parameters [Format (pdf)]
.TP3 Harvard Template (Harvard Graphics taken over by Serif)
.TP4 RollerCoaster Tycoon Track Design Screenshot
.TPB HiJaak PCL Soft Font File Backup
.TPF HiJaak PCL Soft Font File
.TPH Turbo Pascal Help File
.TPI Visual Test Shell File (tests BACnet function of building automation equipment) [Also called EPICS (electronic protocol implementation conformance statement)]
.TPJ TestStand Project
.TPL Turbo Pascal Resident Units
Harvard Template (Harvard Graphics taken over by Serif)
fKey Template Designer Template File
NoteTab Template
CakeWalk Audio Template File
DataCAD Template File
Canvas 7 Template
Timeslips TSImport Template
Adobe Photoshop Tool Preset File
MS Access Workflow Designer
TextBridge Template
.TPM TextPad Macro
.TPP Turbo Pascal Protected Mode Units
Teleport Pro Project (Web spider)
TypePlus File
.TPR GROMACS 3.0 Molecular Dynamics Simulator File
Together Project Definition
TMPEG Enc Video Conversion Project File
.TPS Clarion for Windows Data File
.TPU Turbo Pascal Unit
VAXTPU Command File (VAXTPU is default OpenVMS editor)
.TPW Turbo Pascal Unit
Turbo Profiler Session-state File
.TPZ Compressed File (short for .tar.gz)
.TR Turbo Debugger Session-state Settings
Manual Page Input to UNIX troff -man Command
.TR2 Turbo Debugger Session-state Settings
.TR5 Tree Professional File
.TRC Power CTrace Debug Support File
Oracle SQL*Net Trace Debug File
True BASIC Compiled Code
.TRE PC Tools Directory Tree
VisiRex SDK Tree Function File
Kith and Kin Export File (document/store family trees)
TreeAge Decision Tree File
Wing Commander Series Movie/Game File
EA SPORTS File
.TRF DocuMagix File
.TRG Symantec LiveUpdate File
.TRI Trigram File
.TRK Kermit Script File
Mixman Studio Track
Train Dispatcher Railroad Centgralized Traffic Control Simulation
.TRM Terminal Settings (various)
TRiM High-compression Lossless 8 to 32 bit Truecolor Image File
.TRN Quattro Translation
Adobe Pagemaker File
STN Express Transcript Text File (search science databases through STN®)
MS SQL Server Transaction Backup
TextBridge Training Data
MKS Source Integrity Project Log
.TRO Anti-Trojan File
.TRP Tripmaker File
.TRS Micrografx Executable File
EROSION 3D Temporal Event File [Format (pdf)]
.TRT Team Sports Scheduling System Report Template
.TRU True BASIC Source Code
TruSys System Comparison File
.TRW Turbo Debugger Session-state Settings
.TRX Emerald PC Authorize Batch Transaction File
PASSOLO Translation File (Software localization: translation, etc.)
.TS Tune Smithy File
.TSC Top Secret Crypto Gold File
.TSCE TextShield Zip-compressed .RTF File (TextShield Compression Engine)
.TSG Enable File (DOS suite made by The Software Group)
.TSK Skins (Themes) for Pocket PC PDAs
PhotoImpact Quick Command
.TSL Borland TeamSource File
.TSP Windows Telephony Service Provider
.TSR INMOS Transputer Development System Occam Program Source
.TSS Team Sports Scheduling System Project File
.TST WordPerfect Printer Test File
TextShield Template
Test File
.TSW TestStand Workspace
.TSX Team Sports Scheduling System XML Project File
.TT ThinkTank Outliner (old Apple program)
Star Trek Armada Game Techtree Information
.TTC TrueType Compressed Font
.TTF TrueType Font
.TTK Alchemy Catalyst Translation Toolkit (purchased from Corel)
.TTL Tera Term Macro File
.TTO IBM Client Access File Transfer Description
.TTP Telelogic Tau Project
Atari TOS Executable With Parameters (TOS-Takes-Parameters)
.TTR TeeTree Office File
.TTW Telelogic Tau Workspace
.TTX Crystal Report Data Connection File
.TUB PaintShop Pro Tube File [XnView]
.TUD Thumbs Plus Viewer Graphics
.TUO Thumbs Plus Viewer Graphics
.TUT Tutorial
.TV Paradox Table View Settings
.TV1 WordPerfect Overflow File Above Doc 1 Insert Point (can be 1-9)
.TV4 TValue File (Amortization and time-value-of-money calculations)
.TVC MS Dungeon Siege File [View with Tankviewer]
.TVM TVMconv
.TVO TeveoLive (video recording)
.TVP NVIDIA Graphic Card Update File
.TVS VectorMAX Streaming Video
.TVT RealPlayer
.TVVI InterVideo WInDVR
.TWC Tripwire Configuration File (intrusion detection)
.TWD Simtech MindMapper Mind Map
.TWE ThinkWave Educator Data File
.TWF TabWorks File
Georeferenced Information File
.TWG ThatWaltGuy Web Server File
.TWP Toplevel Computing Fine Words (DOS Word Processor)
Tripwire Policy File (intrusion detection)
.TWR Tripwire Report File (intrusion detection)
.TWS TextPad Workspace File
Tripwire Schedule File (intrusion detection)
.TWW Tagwrite Template
.TX8 DOS Text File
.TXB Descent/D2 Encoded Briefing File
.TXC Urban Chaos Game File
.TXD Grand Theft Auto 3 Texture File [ResHack to veiw and modify]
.TXE Enriched Text File [Info]
.TXF Compressed File (short for .tar.f)
.TXI TeX Support File
.TXL Genesis3D Texture File
.TXM DATAIR Pension Reporter Data File
.TXT Text File (open in Notepad, WordPad, Word, or many other programs)
.TXW Yamaha TX16W Wave Files [Linux Player]
.TXX DataPerfect Text Storage
.TYM PageMaker Time Stamp
.TZ Compressed File (short for .tar.z)
Ingres Time Zone File
.TZB Compressed File (short for .tar.z.btoa)
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.U Unreal System File
.U2 Telelogic Tau UML Model
.U2E Unreal Game Translation
.U2P Telelogic Tau UML Program Text File
.U8 Raw Unsigned 8-Bit Audio Data
.U96 EasyZip Temporary File
.UAP User Agent Wireless Telephony Profile
.UAX Unreal Audio File
.UB Audio File
Raw Unsigned Byte (8-bit) Data
.UC2 Compressed File
.UCF Xilinx Foundation User Constraint File
.UCM Urban Chaos Game File
.UCN Compressed Archive
.UCR MicroSim PCBoard Unrouted Nets Report
.UCS Universal Classification Standard Database File
.UDB PINO 3-Server File
Win2000 Uniqueness Database File (used in setup--provides answers that override defaults for unattended installs)
.UDC Acrobat Spelling File
.UDF MS Excel User Defined Function
Photostyler Image Filter
.UDL MS Data Link
.UDS Sierra Generations Family File (program no longer supported)
.UDW Raw Unsigned DoubleWord (32-bit) Data
.UE2 Encrypted Archive
.UFF DataWave Physiological Data File
.UFO Ulead Object File
.UG Drawing File (various)
.UH MS Age of Kings File
.UHA UHARC Compressed Archive [Download Link]
.UHS Universal Hint System File
.UHTM Unreal Tournament File
.UI User Interface
Geoworks UI Compiler Espire Source
.UIF WordPerfect Long Prompts
.UIH Geoworks UI Compiler Espire Header
.UIN ICQ 2001+ Saved ICQ Contact Information
.UIS WindowBlinds Skin (changes the look and feel of WindowsXP)
.UL uLAW Audio File
.ULD Procomm Uploaded Files
.ULP Peugeot Diag 2000 File (vehicle diagnostic equipment)
.ULS Internet Location Service
.ULT UltraTracker Music Module
.ULW ULAW - Sun/NeXT
.UMB MemMaker Backup Archive
.UMI CDDB Database and PC Music Library in PlayCenter
.UMOD Unreal Self-extracting MOD File
Unreal Tournament
.UMX Unreal Music File
.UNF Btreive Unformatted File
.UNI MikMod (UniMod) Format
Forcast Pro Data File
.UNL Informix Binary File Created by UNLOAD Command
.UNQ Fax View File (unverified)
.UNR Unreal Map File
.UNX Text File (usually UNIX)
.UNV BusinessObjects/WebIntelligence Universe File (End-user query analysis/reporting tool)
.UOL PhotoImpact Object Library File
.UPD dBase Update File
ProUpdater Per/Directory Options Setting File
Universal Print Driver (cross-platform)
Updated Program Data (various)
.UPF Nokia Digital Photo
.UPI ULead Photo Impact Program File [XnView]
.UPJ ULead Project File
.UPO dBase Compiled Update File
.UPR FileMaker User Spelling Dictionary
.UPX ULead Photo Express Saved Image File
.URF Radar ViewPoint Universal Radar Format
.URL Internet Location
.URT Utah Raster Image [XnView]
.USA Unreal Saved Game File
.USB D-Link FM Radio Update
USB Protocol Analyzer Trace (USBChief, USBAdvisor, USBTracer)
.USE MKS Source Integrity File
.USERPROFILE Symantec Live Update User Profile
.USL LaserJet Landscape Font
.USP PageMaker Printer Font
LaserJet Portrait Font
.USR User Database (various)
.UTF AOL Updating Files (found in TOD [Tools on Demand] folder)
.UTL Sound File
.UTP BinPatch Patch Data File
.UTX Unreal Texture File
Unicode File (editor: UniPad)
.UU Compressed Archive File (UUENCODE) [Tutorial]
.UUD Uudecoded [Tutorial]
.UUE Uuencoded [Tutorial]
.UV2 Jane's Combat Simulations F-15
.UVR Ulead Cool 360 Viewer File
.UVW geoManager/geoInterface User View
.UW Audio File
Raw Unsigned Word (16-bit) Data
Unitype GlobalWriter File
.UWF UltraTracker Wave File
.UWL WordPerfect User Word List
.UZE Ultimate Zip Compresion Agent
.UZR UZR 3D Streamable 3D File Format
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.V Verilog File [Icarus]
ReaGeniX Code Generator Consistency Check Support File
Vivid Main Input File
.V$$ Cheyenne/Inoculan AntiVirus Temporary File (reboot then delete - product no longer supported)
.V2D VersaCAD File
.V3D Vecta3D Model File
.V4W V.I.S.A (Visual Interactive Sensitivity Analysis - decision analysis software)
.V64 Nintento 64® Emulation ROM Image (to run search for the Nintendo emulator program of your choice)
.V8 Covox 8-bit Audio
.VAD Mapper Variant File (program for taking an adjudication from a diplomacy judge)
.VAG Sony PlayStation ADPCM Sound File
.VAL Paradox Validity Checks
dBase Values
.VAM Velazquez Application Map
.VAN VistaPro Animation
.VAP Annotated Speech
.VAR Icon Author Variable
Sterling Software Data Dictionary File Sterling merged with Computer Associates.
.VB VBScript File or Any VisualBasic Source
.VBA VBase File
.VBC Visual Business Cards
.VBD ActiveX File
.VBDOC VBdocman Configuration File
.VBDT VBdocman Documentation Template
.VBE VBScript Encoded Script File
.VBF MS Outlook Free/Busy File
.VBG Visual Basic Group Project
.VBK VisualCADD Backup File [Support Group]
.VBL User Control Licensing File
.VBN Norton Corporate Anti-Virus Quarantined File (Caution: file may be infected)
.VBOXLM Aladdin Knowledge Systems Vbox File (software distribution)
.VBP Visual Basic Project
.VBR Remote Automation Registration Files
.VBS VBScript Script File
.VBW Visual Basic Project Workplace
.VBX Visual Basic Extension
.VBZ Wizard Launch File
.VC VisiCalc Spreadsheet File
.VCC VersaCheck Style
.VCD VisualCADD Drawing File [Support Group]
Virtual CD-ROM
.VCE Natural MicroSystems Voice File
.VCEL Vertex Color And Edge List File
.VCF vCard File
Vevi Configuration File
VP HybridCAD Native Format
.VCH Interlock Public Computer Utility
.VCI VP HybridCAD Native Format
Visicontrol Compressed Image File
.VCL Roxio Video CD Layout
.VCM Visual Component File
.VCPREF Symantec Live Advisor Preferences
.VCR ATI Video Recorder File (may require ATI video card to play)
.VCS MS Outlook vCalendar File [Buy Office XP at Shop.Microsoft]
Video Clipstream Video File
.VCT FoxPro Class Library
MindVision Installer Vise (creates software installers)
.VCW MS Visual C++ Workbench Information File
.VCX FoxPro Class Library
Spreadsheet File
.VDA Targa Bitmap
CAD File (federation of the automobile industry surfaces interface file)
Video Display Adapter [XnView]
.VDB Norton AntiVirus Corporate Edition Update File
PC-cillin Quarantined File
.VDF AntiVir Virus Definition File
Vexira Anti-virus Virus Definition File
.VDM VDM Play (VideoSwitch digital CCTV recording)
.VDO VDOScript File
.VDR ComputerEasy Draw File
.VDT VersaPro Variable Declaration Table
.VDX XML for Visio Drawing File
Vector Graphic File
VMM32.VDX: system driver that checks duplicate .VXD files and switches to protected mode
Virtual Device Driver (also see .VXD)
.VEE HP VEE Project File (visual environment for microelectric circuits)
.VEG Sonic Foundry Vegas Video Project
.VEM Voice E-mail File [Free Player]
VeePro Embroidery Software Format
.VENUE VenueBench Data File (design/print reserved seating tickets)
.VEO Victorian Electronic Records Strategy (XML records storage)
.VEW Clipper Viewfile
Lotus Approach View File
Novel Groupwise E-mail View File
.VF Video Factory File (unverified)
.VFB VForm Builder
.VFF Sun TAAC File [XnView]
.VFM Voter Voting Form
.VFN Voter Customer Voting Form
.VFW Video for Windows
.VGA VGA Screen Driver
Targa Bitmap
.VGD Generic CADD VGA Driver
.VGM Video Game Music File Format [VGM Tools]
.VGR Ventura Graphic
.VGS Virtual Game Station Memory Card Save
.VHA Macromedia Sitespring File
.VHD VHDL Design File (text file used in design projects)
.VHDL VHDL Design File (text file used in design projects)
.VI LabView File
Jovian Logic VI Graphics [XnView]
.VIB Chemsoft® Export/Import MSDS Data
.VIC Vicar Picture File [XnView]
.VICAR Vicar Picture File [XnView]
.VID Monitor Control File
Media Player Video
Screen Driver
Quicktime Video
MS-DOS 5 Shell Monitor File
Vidcom 64 [XnView]
.VIF Khoros Visualization Image File [XnView]
Verity [XnView]
.VIFF Khoros Visualization Image File [XnView]
.VIK Viking Picture File
.VIM VIM (Vi IMproved) Editor File
.VIR Virus Infected File (renamed by Symantec Anti-Virus)
.VIS Picture File
APT Assistant File (Business/Project planning)
.VIT LabView File
VITec [XnView]
.VIV VivoActive Player Video File
.VIZ Division dVS/dVISE File
.VJS Quicktime Music File
.VL Visual Labels File
.VL2 Tribes 2 Game (actually a ZIP file)
.VLB Corel Ventura Library
.VLD DataFlex Variable Length Data File
.VLM Vellum CAD Drawing
Ashlar-Vellum File
.VLT Darn! Passwords! Vault File
.VM Geoworks Virtual Memory File
.VM1 Panasonic SD Voice Editor File
.VMC Acrobat Virtual Memory File
.VMDC VMware Virtual Disk File
.VMDK VMware Virtual Disk File
.VMF Ventura Font Characteristics
FaxWorks Audio File
.VMI Dreamcast Download Info File (short file with download info in it)
.VMO Siemens Sl45 Mobile Phone Voice File
Virtools Behavioral Server Composition (Web-based Protected Format)
Cosmopolitan Virtual Makeover File
.VMP Logos Library System 2.x Verse Map
.VMR VBMaximizer File
.VMS Sega Dreamcast VMU Save File (download file --requires .VMI file to point to it)
Sound File [Linux Player]
.VMX VMware Configuration File
VectorMAX Streaming Video
.VMX2 VectorMAX Streaming Video
.VMX3 VectorMAX Streaming Video
.VNA JVC JLIP (controls transfer images from digital camcorders)
.VNC Virtual Network Computing
.VNS Visual Net Server File (Web and XML Application Server)
.VO Vivid Include File
.VOB DVD Video Movie File (MPEG-2 program streams with additional info)
Vue d'esprit [XnView]
.VOC Quartet Audio File
Creative Labs Sound
Sound File [Linux Player]
.VOF VZ Programmer Object Folder
.VOID Halflife Map Voids File
.VOL Tribes 2 Game File
Earth Siege 2 Archive [Dragon UnPACKer]
Giants: Citizen Kabuto Archive [Dragon UnPACKer]
Tribes Archive [Dragon UnPACKer]
Tribes Extreme Archive [Dragon UnPACKer]
.VOR OpenOffice.org Template
.VOX Vox Audio
Dialogic ADPCM
Talking Technology Inc. File
Natural MicroSystmes Voice File
.VP Ventura Publisher File
Freespace Archive [Dragon UnPACKer]
Freespace 2 Archive [Dragon UnPACKer]
.VPA Excite Chat Gestures File
.VPB Quantel VPB Graphic [XnView]
.VPD VitaGraph File (medical testing related)
Virpet Performance Descriptor
.VPG VPGraphics File
.VPL vanBasco Karaoke Player Playlist File
.VPP Virtual Pool Game (unverified)
Red Faction/Summoner Package File
.VPS Visual Pinball Script (external file loaded by .VPT file)
.VPT Visual Pinball Table
.VQE Yamaha Sound-VQ Locator File
.VQF Yamaha Sound-VQ File
.VQL Yamaha Sound-VQ Locator File
.VRC SATLOC VRC (Variable Rate Control)
.VRD VRScape Virtual Reality Model Loader
.VRF Oracle 7 Configuration File
.VRM Quattro Pro Overlay File
.VRO Panasonic DVD Recorder File
.VRP Watcom Project File
.VRS WordPerfect Graphics Driver
.VS Vivid Include File (Surface definition)
.VS2 Roland-Bass Transfer File
.VSD Visio Drawing
.VSDISCO SOAP Dynamic Discovery File (MS SOAP & .NET apps)
.VSL GetRight Download List File
.VSM VisSim Simulation Model
.VSP Virtusales ASP Compiler Project File
SPX Sprite
.VSS Visio Stencil
Shapeware Visio Smartshapes File
.VST Visio Template
Truevision Vista Graphic [XnView]
Targa Bitmap
.VSW Visio Workspace File
.VSX XML for Visio Stencil File
.VSY VNC Spy (VNC host connection manager)
.VT Linux VT100 File (use cat command to view)
.VTC ReliaSoft ALTA 6 & Weibull++ 6 & BlockSim (ReliaSoft's Reliability Software)
.VTD Custom Virtual Device Driver (.VXD)
.VTM Cold Fusion Studio Query
.VTX XML for Visio Template File
.VUE dBase or Foxpro View
3D Studio Animation
.VVF ViVerify Fingerprint
.VVP Visual Voice Project File
.VVR ViVerify Repair
.VVT VersaPro Variable View Table
.VW Volkswriter Text File
Lightscape View
.VWF CADvance Drawing File
.VWL MGI VideoWave Video Wave Library (MGI to be bought by Roxio)
.VWR PC Tools File Viewer
.VWT MGI VideoWave Video Wave Thumbnail (MGI to be bought by Roxio)
.VX EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
.VXD Virtual Device Driver (also see .VDX), also called...
Value-added Driver
.VXML VoiceXML Source File
.VXS Voice Xpress User Profile
.VYD VyperHelp (Hypertext/help editor and converter)
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.W Applause Word Chart
Progress Database File
.W?? Divided Compressed File (?? = 01 to 99; used when installs needed to be on individual floppy disks)
.W14 Genesis 2000 File
.W30 Ventura Printer Font
.W31 Windows 3.1 Startup File
.W3D Black Belt Systems Ray Trace Control File
.W3G Warcraft III File
.W3M Warcraft III Map File
.W40 Win95 Backup File
.W44 dBase Temporary File
.W64 Sonic Foundry Video Editor Wave64 File
.WAB MS Outlook Address Book [Buy Office XP at Shop.Microsoft]
.WAD Doom Game File [WAD Editor] [Dragon UnPACKer]
(Also used for other games)
Gunman Chronicle Archive [Dragon UnPACKer]
Half Life Archive [Dragon UnPACKer]
Heretic Archive [Dragon UnPACKer]
Hexen Archive [Dragon UnPACKer]
Quake Archive [Dragon UnPACKer]
Theme Park World Archive [Dragon UnPACKer]
Half-Life Texture File
.WAF Mayim's WAF Compiler File (3D content for display in Walkabout plug-in)
.WAG Urban Chaos Saved Game File
.WAL WalMaster Showlist File
Quake 2 Texture File [XnView]
Winamp3 Skin Format
.WAR Archived Konqeror (KDE) HTML Page
Java Web Archive
.WAS Procomm Plus Script Source Code File
.WAV Waveform Audio (PCM Wave)
SHARP MZ-series Emulator File
.WAX Procomm Plus Compiled Script File
Metafile (points to Windows Media Video [.WMA] file)
.WB Dictionary Project Data File
.WB1 QuattroPro for Windows
.WB2 QuattroPro for Windows
.WB3 QuattroPro for Windows
.WBA Winace Zip File
WindowBlinds Compressed Skin (changes the look and feel of WindowsXP)
.WBC Webshots Picture Collection (library)
.WBD Webshots Graphic Format
.WBF Windows Batch File
.WBI White Blotter, Inc. Advanced Code Editor
.WBK Word Backup [Buy Office XP at Shop.Microsoft]
WordPerfect Workbook
.WBL Argo WebLoad II Upload File
.WBM Webmin Module (Linux)
WinBatch File
Wireless Bitmap File (WML-related file) [Tutorial]
Macromedia Fireworks File
.WBMP Wireless Bitmap File (WML-related file) [Tutorial]
Macromedia Fireworks File
.WBR Crick WordBar File
.WBS WebExpress Website File
WinBot IRC Client Script
Webshots Screensaver
.WBT WinBatch Script
Crick Wordbar Template
.WBX Webigger File
.WBZ WebShots File [MIME Type: application/x-webshots]
.WC Windows Commander File Tree Info (TREEINFO.WC)
.WC4 WinCheckIt4 Settings File
.WCD WordPerfect Macro Token List
.WCFG WildTangent Configuration
.WCI Catalog File Maintained by MS Indexing Service (CATALOG.WCI)
.WCM Works File Transmission
WordPerfect Macro
.WCP WordPerfect Product Info
.WCR Ergane Configuration File (dictionary)
.WCS Website Content Source
.WCT WorldCast Project
.WD2 WordExpress Document
Info Select for Palm Organizer File
.WDA RUMBA® OFFICE 95/N Configuration File
.WDAT WildTangent Data File
.WDB Works Database
.WDF Workshare DeltaView DeltaFile (difference between two documents)
ReliaSoft Weibull 5.0 (Life Data Analysis Software)
.WDG ReliaSoft Weibull 4 (Life Data Analysis Software)
.WDK WhizFolder Desktop File
.WDL Windows XP Watchdog Log File
3D Game Studio Window Definition File (this one is free)
3D GameStudio World Definition Language File (this one you pay for)
.WDR Star Wars - Tie Fighter Media
.WEB Web Vector Graphic File
Corel Xara Web Document
XaraX Web Document
.WEBPNP MS Support for Internet Printing
.WF1 EViews Workfile (Econometric software)
.WFA WinFax Pro Archive
.WFB Turtle Beach WaveFront Bank
.WFD Turtle Beach WaveFront Drum Set
.WFL Ultimus Workflow Suite Workflow File
.WFM dBase Form Designer Form Object
.WFN Corel Symbols and Fonts
.WFP Turtle Beach WaveFront Program
.WFS Windows Installation Script
.WFX Winfax Data File
.WG1 Lotus 1-2-3 Worksheet
.WG2 Lotus 1-2-3 Worksheet
.WGF WaterGuide File (Decision Support System Water Reuse)
.WGM Citizen Watch Hyper Aqualand Graph Software
.WGP Wild Board Games File
.WGS WGS File Generator Web Segment File
.WGT Worms Armageddon Teams File
.WHT MS NetMeeting Old Whiteboard Document
.WI Wavelet Image (different compression for JPEG) [Info resource]
.WIC wIntegrate File
J Wavelet Image Codec [XnView]
.WID Ventura Width Table
.WIF Weaving Information Format
Wavelet Image File
Wang Image File (fax related usually)
.WIL Windows Interface Language Script
WinImage File (Floppy and disk imager)
.WIN dBase or Foxpro Window
Wonderware InTouch Window
Windows Backup File
Normalised Extinction Corrected Differential Photometry with Tapered Ends
.WINI WildTangent Configuration File
.WINWARE WinWare Windows Applet (general purpose mini-applications)
.WIP Windows Installer Project (opens with MS Visual Studio Installer)
.WIRE Alias Wavefront Studio Wireframe
.WIS wIntegrate Basic Script File
.WIZ Wizard File [MS Publisher and Word]
.WJP WildTangent Branded .JPG File
.WK! Lotus Spreadsheet File
.WK1 Lotus Spreadsheet File
.WK3 Lotus Spreadsheet File
.WK4 Lotus Spreadsheet File
.WKB WordPerfect Document
.WKB Workbook
.WKE Lotus Educational Version Spreadsheet File
.WKQ Quattro Spreadsheet
.WKS Lotus Spreadsheet File
XLISP Workspace
MS Works Spreadsheet
.WKZ Compressed Spreadsheet
.WL WISCO Word Power (Vocabulary Activities)
.WL1 File for Shareware Version of Wolfenstein 3D
.WL6 File for Registered Version of Wolfenstein 3D
.WLD REND386/AVRIL File
ArcView World File For CAD Datasets
.WLF Argo WebLoad I Upload File
.WLG Dr. Watson Log
.WLK Virtus Walkthrough Graphics
WeatherLink ver 5.2 Binary Weather Data (from Davis Instruments weather station)
.WLL Word Add-in [Buy Office XP at Shop.Microsoft]
The Sims (Maxis) Wall Texture File
.WLM CompW [XnView]
.WLR VRML Page
.WLS 602 pro PC SUITE Worksheet File
.WLT eWallet File
WaveL Wavelet Compressed Graphic
Words of Worship Liturgy (song projection software)
.WLV Web Link Validator File
.WLZ WinImage File (Floppy and disk imager)
.WM Windows Media A/V File
.WMA Windows Media Audio File
.WMC WordPerfect Macro
Wordmarc Text File
Windows MathCad Startup File Backup
.WMD Windows Media Download File (compatible with Windows Media Player 7 or later)
.WMF Windows Metafile (MS graphic format)
.WML Wireless Markup Language File (HTML file for wireless devices)
.WMN DART Pro 98 Playlist
.WMP MS JScript Proxy Auto-Configuration
Windows Media Player File
.WMS Windows Media Skin File (compatible with Windows Media Player 7 or later) [Also see]
.WMV Windows Media File (contains both video and audio)
.WMX Audio Playlist
Windows Media Player A/V Shortcut
.WMZ Windows Media Compressed Skin File (compatible with Windows Media Player 7 or later) [Also see]
.WN Write Now Text File
.WNF Corel Outline Font
.WNS PrintShop Newsletter
.WO4 STABCAL (stability calculation for aqueous systems) File
.WO7 STABCAL (stability calculation for aqueous systems) File
.WOA Windows Swap File
.WOC Windows OrgChart Organization
.WOR MapInfo Workspace
STABCAL (stability calculation for aqueous systems) File
.WOS Words of Worship Output Settings (song projection software)
.WOT WebEx Saved Meeting Movie
.WOV Cakewalk Home Studio Picture Cache Clip File
.WOW Grave Composer Music Module
.WP WordPerfect Document File
Sharp Fontwriter Word Processing File
.WP4 WordPerfect Document File
.WP5 WordPerfect Document File
.WP6 WordPerfect Document File
.WPA ACT! Word Processor File (.WPA and .WPD used for different versions)
.WPD WordPerfect Screen Driver or Document
602 pro PC SUITE Document File
ACT! Word Processor File (.WPA and .WPD used for different versions)
.WPF WordPerfect Text File
Enable Document
WorldPort Fax
.WPG WordPerfect/Drawperfect Graphics
WildTangent Branded .PNG File
.WPI WCPUID Plug-in (WCPUID confirms reliability of presentation data by CRC code)
.WPJ W32Dasm Project File
.WPK Keyboard
WordPerfect Macros
.WPL Words of Worship Playlist (song projection software)
Online WebPanel File
WHAT IF MOL-object (molucular images)
Draxy Software Wallpaper Sequencer
PFS WinWorks Spreadsheet
Winwall (Freeware wallpaper changer)
.WPM WordPerfect Macro
.WPS Works Text Document
.WPT WordPerfect Template
602 pro PC SUITE Template Document File
.WPW PerfectWorks Document
WordPerfect Document
.WPX Adobe printer Information File (Usually found in C:\Windows)
.WQ! Compressed Quattro Pro Spreadsheet
.WQ1 Quattro Pro Spreadsheet
.WQ2 Quattro Pro Spreadsheet
.WR! Compressed Lotus Spreadsheet
.WR1 Symphony Spreadsheet File
.WRAP MediaForge Runtime Player
.WRD Charisma Template
.WRF WebEx Recording (MS Office add-in for meetings, etc.)
.WRI Write Document (Use WordPad to open)
.WRK Spreadsheet File
Cakewalk Music Project File
DATAIR Pension Administration System Work File (temporary file)
.WRL Plain Text VRML File [VRML]
.WRML Plain Text VRML File [VRML]
.WRP Amiga Compressed Archive File
.WRS WordPerfect Windows Printer Driver
.WRT IBM Writing Assistant File (DOS Application)
.WRX Progress Database File
.WRZ GNUZIP Compressed VRML File [VRML]
.WS WordStar Document
SmartWare Worksheet (requires login)
Hummingbird Exceed File
IBM iSeries Client Access File
SigmaNEST (CAD Software)
Rhino 1.0, 1.1, 2.0 File (3D modeler)
.WS1 WordStar for Windows 1 Document
.WS2 WordStar for Windows 2 Document
.WS3 WordStar for Windows 3 Document
Rhino 3.x File (3D modeler)
.WS4 WordStar for Windows 4 Document
.WS5 WordStar for Windows 5 Document
.WS6 WordStar for Windows 6 Document
.WS7 WordStar for Windows 7 Document
.WSA Animation Shop Workspace
.WSAD WildTangent Actor Definition
.WSBM WildTangent Material File
.WSC Windows Script Component
.WSD WordStar Data File
EROSION 3D Watershed [Format (pdf)]
.WSDL Web Services Description Language File (used by XML applications)
.WSE Wise File
.WSF Windows Script File [WinForce]
.WSG Words of Worship Song (song projection software)
.WSGO WildTangent Mesh and UVW Mapping File
.WSH Windows Script Host Settings File
.WSM SMS Installer Working File
.WSMO WildTangent Motion File
.WSP Chromeleon Wordspace
Paint Shop Pro Workspace
Fortran PowerStation Workspace [FORTRAN]
Whisper 32 Password Manager
.WSQ Wavelet-packet Scalar Quantization
.WSR FirstStop WebSearch File
.WSS ReliaSoft RG (Reliability Growth Analysis Software)
.WST WordStar Text File
.WSX WinMX Filesharing Program
.WSZ WinAmp Skin Zip File
.WT WildTangent Branded .X 3D Model
.WT2 WordExpress Document Template
.WTX ASCII Text File
.WTXT WildTangent Branded .TXT File
.WV WavPack Lossless Audio Compression
.WVE Component of a DIVX Movie Conversion
Psion Series 3a/3c/3mx Waveform Sound File [Player]
.WVL Wavelet Compressed Bitmap
.WVX Metafile (points to Windows Media Video [.WMV] file)
.WWB WordPerfect Button Bar
.WWK WordPerfect Keyboard Layout
.WWL Word Add-in File
.WWP Worms World Party Teams File
.WWS AutoRoute User Information
.WWV WildTangent Branded .WAV File
.WXB EXP: The Scientific Word Processor
.WXP EXP: The Scientific Word Processor Document
.WXS Easy Cross File (cross stitch design)
.WZB Librarian of OZ Sharp Book Viewer Add-on
.WZD Sharp Organizer Program or Data File
.WZG WZebra File
.WZN WhizFolder Document
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.X LEX Program File
Amapi 3D Modeling (prior to version 4)
Stardent AVS X Image [XnView]
Xview Object (create DirectX 3D scenes)
.X01 Paradox Secondary Index (can be 01 to 09)
.X16 Macromedia Program Extension (16-bit)
.X32 Macromedia Program Extension (32-bit)
.X3D Xara 3D Project File
.X4M TeamLinks Mail File Data
.X5 Rockwell Software Logix 5 File
.X_T Parasolid CAD File
.XA Extended Architecture File
The Sims (Maxis) Extensive Audio
File on PSX Disc
Gear CD Suite File
.XAB Xenis Mail Address Book
.XAN XANIA® Browser
xyALGEBRA File
.XAR Xara X Vector Drawing
Corel Xara Drawing (old)
.XBE Xbox Executable [Convert to .EXE]
.XBF Emperor Battle for Dune [Format]
.XBM X Bitmap Graphic
.XBS ETAK MapBase
.XCF GIMP Image File [GIMP] [XnView]
.XDF Workshare Synergy File
Milnta APL Transfer Function (Dyalog APL File)
.XDP UNIX File (unverified)
.XDS OpenGL Performer Script
.XDW Fujixerox DocuWorks File [Viewer (in Japanese)] [Viewer (in English)]
Milnta APL Transfer Function (Dyalog APL Workspace)
.XFD XML Form in XFDL Format [Viewer]
.XFDF Acrobat Forms Document
.XFM OmniForm XML Format
.XFN Ventura Printer Font
.XFR Symantec Norton Anti-Virus Corporate Version Failed Update
.XFT Chiwriter 24 Pin Printer Font
.XFX Fax File (various)
.XG1 Techno Toys XG-909 MIDI Drum Machine File
.XG9 Techno Toys XG-909 MIDI Drum Machine File
.XGM Techno Toys XG-909 MIDI Drum Machine File
.XGO LogMate for Windows File
GeoConcept File
.XGR MS Graph Edit XML Graph
.XI Fast Tracker 2 Instrument
ScreamTracker Instrument File
.XIF Wang Image File
Often a Fax Image (TIFF) File
ScanSoft Pagis XIF Extended Image Format (FAX)
Xerox Image File
.XIP Hotbar Image Compression Format
.XJS WinExplorer Java Script
.XJT Compressed GIMP Image with Properties of GIMP (.XJT is plain tar file)
.XJTGZ Compressed GIMP Image with Properties of GIMP (gzip compressed tar file)
.XJTZ2 Compressed GIMP Image with Properties of GIMP (bzip2 compressed tar file)
.XL Old Amiga Movie Format
.XLA Excel Add-in [Buy Office XP at Shop.Microsoft]
Xlib Archive
.XLB Excel File [Buy Office XP at Shop.Microsoft]
.XLC Excel Chart [Buy Office XP at Shop.Microsoft]
.XLD Excel Dialog [Buy Office XP at Shop.Microsoft]
.XLG Xnetech Engraving Logo File
.XLK Excel Backup [Buy Office XP at Shop.Microsoft]
.XLL Excel Add-in (Dynamic Link Library) [Buy Office XP at Shop.Microsoft]
.XLM Excel Macro [Buy Office XP at Shop.Microsoft]
.XLR MS Works File
.XLS Excel Worksheet [Buy Office XP at Shop.Microsoft]
(also MS Works spreadsheet)
DATAIR Data Import Specification Translation File
.XLSHTML Excel HTML Document [Buy Office XP at Shop.Microsoft]
.XLSMHTML Excel Archived HTML Document [Buy Office XP at Shop.Microsoft]
.XLT Excel Template [Buy Office XP at Shop.Microsoft]
Procomm Plus Translation Table
Lotus Translation Table
.XLTHTML Excel HTML Template [Buy Office XP at Shop.Microsoft]
.XLV Excel VBA [Buy Office XP at Shop.Microsoft]
.XLW Excel Workspace [Buy Office XP at Shop.Microsoft]
.XLX XoloX Incomplete Download File
.XM Sound File
Fast Tracker 2 Extended Module
.XMAP File That Controls How XML/XSL Gets Served (SITEMAP.XMAP Info) [ASCII Text File]
.XMB X-Wing Mission Briefing File
.XMF Milnta APL Transfer Function (Mainframe (SAM) File)
.XMFG MediaForge Runtime Player
.XMI Winamp Extended Midi File
EverQuest File
.XML Extensible Markup Language File [XML]
.XMP Graphic File
.XMS ViewCafé XML Markup Session
.XMT_TXT Parasolid CAD File
.XMV Milnta APL Transfer Function (Mainframe (SAM) Workspace)
.XMX Character Set File
AutoCAD External Message Compiled File
.XNF Standard Network File Form
.XNG OM2 911 Xchange Version 6 Document
.XNK Exchange Shortcut
.XOT Xnetech Job Output File
.XP WinXP Theme (unverified)
.XPI Mozilla Browser Archive (open with any ZIP utility)
.XPL Music File
WinExplorer Simple Script
.XPM X Picsmap Graphic
.XPO Omega Research ProSuite
.XPP xCOMPOSER.pro Multimedia Data File
.XPTHEME Winstyles Theme (customizes the Windows Desktop)
.XPW Screen-Fillable Surfer Version of a Form
Leading Market Technologies EXPO (professional investment charting/analysis)
.XPY MarketBrowser (investment charting/analysis)
.XQT SuperCalc Macro Sheet
Waffle Executable File
.XRF Cross Reference
.XR1 Epic MegaGames Xargon File
.XRF Crossreference File
.XS Hummingbird Exceed File
.XS8 SIMUL8 (Business Simulation XML file)
.XSD XML Schema File [XML] (read in text editor)
.XSF Milnta APL Transfer Function (APL+Win File (former STSC))
.XSI Softimage XSI
.XSL XML Stylesheet (eXtensible Style sheet Language for Transformations (XSLT)) [XML] (read in text editor)
FileMaker Database Design Report Template
.XSM LEXIS-NEXIS Tracker
.XSN xyALGEBRA File
.XSW Milnta APL Transfer Function (APL+Win Workspace (former STSC))
.XT* Crosstalk Related File
.XTB LocoScript External Translation Table
.XTG Quark Xpress Tags File
.XTR RealArcade Compressed Data File
.XTS CSPro File (combined IMPS and ISSA Census Processing System)
Babya Desktop Shell System Software Extension
.XUF Milnta APL Transfer Function (Unix (SAX) File)
.XUL XML User Interface Language
.XUW Milnta APL Transfer Function (Unix (SAX) Workspace)
.XV Khoros Visualization Image File [XnView]
.XVB WinExplorer VB Script
.XVP Xview Package File (create DirectX 3D scenes)
.XVS Xview Scene Package File (create DirectX 3D scenes)
.XVU BOClean Database File
.XWD X Windows Dump
Crossdown Puzzle File
.XWF Yamaha XG Works File
.XWI X-Wing Mission File
.XWK Crosstalk Keyboard Mapping
.XWP Crosstalk Session
XMLwriter XML Editor File
Xerox Writer Text File
.XX Xxencoded File
Arcedit Temporary File
.XXE Xxencoded File
.XXL Archived File [Archive for Win] [FILEH for LINUX]
.XXX Singer Sewing Machine Professional SewWare File
Embroidery Design File [possibly read with Melco Sizer Software]
Controlware VJ400 Digital CCTV Recording
.XXY SPARC Executable Script File (e.g., /etc/hostname.xxy identifies network interface on local host)
.XY XYWrite Text File
.XY3 XYWrite Text File
.XY4 XYWrite IV Document
.XYP XYWrite III Plus Document
.XYW XYWrite Windows 4.0 Document
.XYZ XMol XYZ (MIME type chemical/x-xyz)
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.Y Amiga Yabba Compressed Archive File
Yaac Grammar File
Desktop Color Separation Specification Yellow Layer (usually an EPS file)
.Y01 Paradox Secondary Index (can be 01 to 09)
.Y64 Commandos 2 Game Mission
.YAB YaBasic Source
.YAL Arts & Letters Clipart
.YBK Encarta Yearbook
.YDK Yusuf Data Recovery (unverified)
.YENC yEnc Encoded File (usually on usenet)
.YLT TheWord & Bible Companion Young's Literal Translation Bible
.YMAP Ygnius Computer Aided Thinking File
.YMG Yahoo! Messenger File
.YMP MicroSim PCBoard Mapping File (matching PADS package names to MicroSim package and footprint names)
.YNC yEnc Encoded File (usually on usenet)
.YPK MicroSim PCBoard Mapping File (matching PADS decal names to MicroSim footprint names)
.YPS Yahoo! Messenger File
.YSP Bitmap Graphic (unconfirmed)
.YUV Color Space Pixel Format
.YZ Yac Compressed Archive File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.Z Compressed Archive File
.Z?? WinZip Split Compressed Archive (?? is a number from 01 upward)
.Z# Frotz Z-Code Game
.Z0 ZoneAlarm File
.Z1 ZoneAlarm File
.Z3 Infocom Game Module
.Z64 Nintendo 64 Emulator
.Z80 ZX Spectrum Emulator
Z80 Snapshot [Format]
.ZA? (? = A, B, C,...) Output of the UNIX SPLIT Utility (portions of a file)
.ZAP FileWrangler Compressed File (only used in beta)
MS Windows Software Installation Settings
.ZARGO Poseidon UML CE/SE Diagram
.ZAX Z-Axis 3-D Office Design Software
.ZBA Compressed File Run Through UNIX COMPRESS and BTOA Utilities
.ZBD MechWarrior 3 Snow Fields File
Canon ZoomBrowser Database File
Zebedee Encrypted File
.ZBF Z-Buffer Radiance File
.ZC Zipkey Configuration File
.ZCH ZIG File (ZIG Game Construction Kit)
.ZDB Wonder Word Data File
.ZDF Z-Firm Document Folder
.ZDG ZView Compressed Document
.ZDP ZDNet Password Pro 32 (My Passwords.zdp)
.ZEI ANNO 1602 Game
Logocad Triga File
.ZER Zerberus File
.ZFS C++ Assembly Source
Z-Firm File Stub
Interstate '76 Archive [Dragon UnPACKer]
Interstate '82 Archive [Dragon UnPACKer]
.ZFSENDTOTARGET Compressed Folder SendTo Target File
.ZGM ZenoGraphics File
.ZHP Zipped SwiftView File
.ZID Z-Firm ID
.ZIG ZIG Game File (ZIG Game Construction Kit)
.ZIM PagePath Technologies Compressed Mac File
.ZIN Z-axis: The Next Generation (3D Office CAD AutoCAD application)
.ZIP Compressed Archive File
.ZL? ZoneAlarm Mailsafe Renamed File
ZoneAlarm Mailsafe will quarantine mail attachments and changes
their extension. The conversions are:
.ADE to .ZL0, .ADP to .ZL1, .BAS to .ZL2, .BAT to .ZL3, .CHM to .ZL4,
.CMD to .ZL5, .COM to .ZL6, .CPL to .ZL7, .CRT to .ZL8, .EXE to .ZL9,
.HLP to .ZLA, .HTA to .ZLB, .INF to .ZLC, .INS to .ZLD, .ISP to .ZLE,
.JS to .Z0, .JSE to .ZLF, .LNK to .ZLG, .MDB to .ZLH, .MDE to .ZLI,
.MSC to .ZLJ, .MSI to .ZLK, .MSP to .ZLL, .MST to .ZLM, .PCD to .ZLN,
.PIF to .ZLO, .REG to .ZLP, .SCR to .ZLQ, .SCT to .ZLR, .SHS to .ZLS,
.URL to .ZLT, .ASP to .ZLT, .VB to .Z1, .VBE to .ZLU, .VBS to .ZLV,
.WSC to .ZLW, .WSF to .ZLX, .WSH to .ZLY, .ASX to .ZLZ
[Documentation]
.ZLX Atlantis Ocean Mind Word Processing File
.ZM? ZSNES Movie (? = number of the movie)
.ZMF Zoner Draw File
.ZMI Chrono Chaos Creations milCgi (bulk mailer)
.ZMK Z-Up Maker Project File
.ZMV ZSNES Movie File
.ZOM Amiga Compressed Archive File
.ZOO Compressed Archive File
Zoo Tycoon Game File
.ZOT Zoot Database File
.ZPK Z-Firm Package
.ZPL ZIG File (ZIG Game Construction Kit)
.ZRS MS Hearts Game File
.ZS1 ZSNES Slot 1 Savestate (Super Nintendo emulator)
.ZS2 ZSNES Slot 2 Savestate (Super Nintendo emulator)
.ZS3 ZSNES Slot 3 Savestate (Super Nintendo emulator)
.ZSK Embroidery Machine Stitch File (VeePro) [possibly read with Melco Sizer Software]
.ZSR Form*Z Temporary Save File ($$$FMZ$$$.ZSR)
.ZST ZSNES Slot 0 Savestate (Super Nintendo emulator)
.ZTD Zoo Tycoon Game Add-in
.ZTE E-Tabs Reader File
.ZTM ZTreeWin Macro
.ZTX Z-axis: The Next Generation (3D Office CAD AutoCAD application)
.ZVD ZyXEL Voice File
.ZVW Z-axis: The Next Generation (3D Office CAD AutoCAD application)
.ZW Chinese
.ZX KGB Shapshot [Format]
.ZX82 Speculator '97 Shapshot [Format]
.ZXS ZX32 Shapshot (unrelated to ZXS tape format) [Format]
.ZZL ZZTAE, KevEdit (Stores ZZT object information)
.ZZM ZZT Music Player, ZZTAE, KevEdit
.ZZT ZZT Game Creation System [File Format]
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.? Multi-part Super Nintendo Game-console ROM Image (? = 1, 2, 3, etc.) [See ZNES or SNES9x]
.0 Inno Setup Binary File
.000 (000-999) Sequentially Numbered Backup Files
(000-600) Paperport Scanned Image
(.000 is desktop, .100-.600 images - number may include hex "a" to "f")
(000-999) ARJ Multi-volume Compressed Archive (also see .A00)
MS Doublespace Compressed Data File
Geoworks Data File
.00B PenSoft Payroll Backup File
.001 (001-999) HJSplit File (file splitter for large files)
Fax Data File (various) [XnView]
Tagged Image Format File [SwiftView]
.01B PenSoft Payroll Backup File
.075 Ventura Publisher 75dpi Screen Characters
.085 Ventura Publisher 85dpi Screen Characters
.091 Ventura Publisher 91dpi Screen Characters
.096 Ventura Publisher 96dpi Screen Characters
.0B PageMaker Printer Font LineDraw Characters
.1 Inno Setup Binary File
Roff/nroff/troff/groff Manual Source (UNIX)
.10X Gemini Bitmap Printer Graphics File
.113 Iomega Backup File
.123 Lotus File
.12M Lotus Smartmaster File
.12U PageMaker Font File
.15U PageMaker Printer Font
.196 Computer Snooper Log File
.1PE TurboTax Form File
.1ST Information (e.g., README.1ST)
.1TX 1toX File (Logipole)
.22 Clipstream 20 Kb Stream
.24B 24-bit Graphic File
.261 H.261 Encoded Video File (usually .P64) [Player]
.263 H.263 Encoded Video File [Player]
.286 Windows Standard Mode Driver
.2BP Pocket PC Bitmap [XnView]
.2D 2D VersaCAD Drawing File
Amapi [XnView]
.2DC Cadwork 2D Catalog
.2DR Cadwork Road
.2GR Windows EGA/VGA Screen Grabber [EGA] [VGA]
.3 Solaris Device Configuration Assistant Boot Diskette
.301 Brooktrout Fax-Mail File [XnView]
.303 Seq-303 Settings
.320 Chromelion Demo Data File
.323 H.323 Internet Telephony
.32X Gens 2.0 File (Sega Genesis/Megadrive/32X Emulator)
.340 Chromelion Demo Data File
.386 Windows Enhanced Mode Driver or Swap File
.3A3 STABCAL (stability calculation for aqueous systems) File
.3A5 STABCAL (stability calculation for aqueous systems) File
.3B3 STABCAL (stability calculation for aqueous systems) File
.3B5 STABCAL (stability calculation for aqueous systems) File
.3C3 STABCAL (stability calculation for aqueous systems) File
.3C5 STABCAL (stability calculation for aqueous systems) File
.3D VersaCAD 3D Drawing File
.3DB 3D Mark Database (system testing - unverified)
.3DM 3D Modeler File
.3DMF QuickDraw 3D Metafile
.3DML Rover 3D Modeling
.3DP Serif 3D Plus
.3DS 3D Studio Graphic
.3DV Visual Component File
.3DZ Easy 3D Creator Project File
.3FX Corel Chart 3D Effect
.3GR Windows SVGA/XVGA Screen Grabber [SVGA]
.3IN MSN Setup Information
.3O3 STABCAL (stability calculation for aqueous systems) File
.3O5 STABCAL (stability calculation for aqueous systems) File
.3PI 3rd PlanIt File (CAD program for model railroads)
.3T4 Binary to ASCII Conversion
.3TA Triple-T Animation
.3TP Triple-T Plug-in
.3XE 3DLinX Entity (3D drawing tool)
.404 FruityLoops Channel State File (replaced by .FST in ver 2.5.0)
.411 Sony Mavica Data File [XnView]
.44 Clipstream 32 Kb Stream
.4A3 STABCAL (stability calculation for aqueous systems) File
.4A5 STABCAL (stability calculation for aqueous systems) File
.4B3 STABCAL (stability calculation for aqueous systems) File
.4B5 STABCAL (stability calculation for aqueous systems) File
.4BIT GoDot [XnView]
.4BT GoDot [XnView]
.4C$ 4Cast/2 Data
.4C3 STABCAL (stability calculation for aqueous systems) File
.4C5 STABCAL (stability calculation for aqueous systems) File
.4DB 4D Database Structure File (data fork - .RSR for resource fork)
.4DD 4D Database Data File (data fork - .4DR for resource fork)
.4DF 4D Database Windows Search Document
.4DL 4D Database Windows Log File
.4DR 4D Database Data File (resource fork - .4DD for data fork)
.4DS 4D Database Windows Data Segment
.4DX 4D Database Plug-in (data fork - .RSR for resource fork)
.4FI 4D Database Windows ASCII Map
.4FR 4D Database Windows Apply Formula Document
.4GE Informix 4GL Compiled Code
.4GL Informix 4GL Source
.4H3 STABCAL (stability calculation for aqueous systems) File
.4LB 4D Database Windows Label
.4LK 4D Database Windows Hot Link File
.4O3 STABCAL (stability calculation for aqueous systems) File
.4O5 STABCAL (stability calculation for aqueous systems) File
.4PP PhotoParade Player (digital slideshow)
.4QR 4D Database Windows Quick Report
.4ST 4D Database Windows Saved Set
.4SW 4DOS Swap File
.4TH FORTH Program
.4UG 4D Database Windows User/Groups Set
.4V Quartet Music File
.4VR 4D Database Windows Saved Variable
.521 Murray State University Trojan Ring Configuration File
.60D Vista Columbus Digital CCTV System Recording (also see .60H) [Reader]
.60H Vista Columbus Digital CCTV System Recording (also see .60D)
.602 T602 Text File
.608W Audiogalaxy Music File (unverified)
.669 669 Tracker Module
Unis Composer Music File
.6AM Haltech ECU Fuel and Ignition Map
.6CM Triton FastTracker 6-Channel Music
.710 Korg Triton Music Workstation
.73? TI-Graph Link File
.73I TI Bitmap [XnView]
.7Z 7-Zip Compressed File
.8 A86 Assembler Program File
.82B TI-82 Graph Link Backup
.82G TI-82 Graph Link Group
.82I TI Bitmap [XnView]
.82P TI-82 Graph Link Program
.83I TI Bitmap [XnView]
.83P TI-Graph Link (TI-83 Program)
.85I TI Bitmap [XnView]
.86I TI Bitmap [XnView]
.86P TI-86 Calculator File (mainly a game file)
.8BA Adobe PhotoDeluxe Plugin (also ends in E, F, I, X, & Y)
.8BF Filter Factory File [Added]
.8CM Triton FastTracker 8-Channel Music
.8LI Adobe Photoshop Plug-in (Often works with other graphics programs)
.8M PageMaker Math 8 Printer Font
.8SVX Sound File [Linux Player]
.8U PageMaker Roman 8 Printer Font
.8XK MirageOS Flash Application for TI-83 Plus
.8XP TI-83 Program
.8XU TI-83 Program
.83? TI-Graph Link File
.89? TI-Graph Link File
.89I TI Bitmap [XnView]
.906 Calcomp Plotter File
.917 Trend Antivirus File
.92G TI-92 Graph Link Group
.92I TI Bitmap [XnView]
.92P TI-92 Graph Link Program
.92T TI-92 Graph Link Text
.999 Multipass Security File
.9XK TI-92 Circuit Analysis File
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.### Temporary File
.#24 Locoscript 24-pin Printer Data File
.#IB Locoscript Dot Matrix Data File
.#SC Locoscript Dot Matrix Data File
.#ST Locoscript Dot Matrix Printer Definition File
.$$$ Temporary File (various)
.$00 DOS Pipe File (could also be .$01)
.$$A OS/2
.$$F OS/2 Database
.$$P OS/2 Notes
.$$S OS/2 Spreadsheet
.$D$ OS/2 Planner Data File
.$DB dBase Temp File
.$ED MS C/C++ Temporary Editor File
.$LN Borland C++ TLink Response File
.$VM MS Windows Virtual Manager Temp File
.$#! Cryptext
.(D) pcAnywhere Temporary File
.@@@ Screen Files (shown during various installations)
.@HA ImsiSoft E-mail Animator
._DD Norton Disk Doctor Recovered File
._DM Nuts n Bolts Disk Minder Recovered File (Helix Software now part of McAfee)
._MP InstallShield Temporary Installer File
.?q? Squeeze
.??? ANY three character audio file: May be a dictation file where the
extension is the dictator's initials; playable by BCB Voice Systems
software. This could likewise be a dictation file in TrueSpeech format.
Use Windows Sound Recorder and/or Media Player to pay these back.
.~ Temporary File
.~AP Borland C++ AppExpert Project Database File
.~DE Borland C++ Project Backup File
.~DF Borland Delphi Backup File
.~DP Borland Delphi Backup File
.~DR ARKEY Drawing Backup File
.~MN Norton Menu Backup
.~NT NT Install Files (Used between first & second reboot)
.~PA Borland Delphi Backup File
.~PR Terramodel Project Backup
.~SG TapCIS Message Index File
.~$~ 1st Reader Temporary File
Developer permissions...
.
This total file may not be included in any other software or
project which presents the data to the public or portions of
the public. Any developer who wishes to include up to (but
not more than) 2,000 individual entries from this file is free
to do so provided certain conditions are met. These are:
.
1) Credit must be given to FILExt. If links are available
in the developed product then one must also be provided to
FILExt as http://filext.com.
.
Suggested text: "File extension list courtesy of FILExt.
For a more extensive list visit http://filext.com."
.
2) Once the extensions are chosen for one product by any
developer then these same extensions must continue to be
used by that developer for any other projects (i.e., you
cannot take one set of 2,000 for one project and a different
set of 2,000 for another project; it's a total of 2,000).
.
3) If links are available in the developed product then any
links appearing associated with any of the 2,000 picked
extensions must be included in the product. (This covers
future plans to include such links in this list.)
.
When the project is complete please notify FILExt with the
specifics at [email protected]. We're always interested
in how the list is being used. Thank you.
.
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