loc.rb

# Library of Congress Main Classes and Subclasses
{
  "A" => { 
    :name => "General Works",
    :subclasses => {
      "AC"   => "Collections; Series; Collected works",
      "AE"   => "Encyclopedias",
      "AG"   => "Dictionaries and other general reference works",
      "AI"   => "Indexes",
      "AM"   => "Museums. Collectors and collecting",
      "AN"   => "AN Newspapers",
      "AP"   => "Periodicals",
      "AS"   => "Academies and learned societies",
      "AY"   => "Yearbooks. Almanacs. Directories",
      "AZ"   => "History of scholarship and learning. The humanities",
    }
  },
  "B" => {
    :name => "Philosophy, Psychology, Religion",
    :subclasses => {
      "B"    => "Philosophy (General)",
      "BC"   => "Logic",
      "BD"   => "Speculative philosophy",
      "BF"   => "Psychology",
      "BH"   => "Aesthetics",
      "BJ"   => "Ethics",
      "BL"   => "Religions; Mythology; Rationalism",
      "BM"   => "Judaism",
      "BP"   => "Islam; Bahaism; Theosophy, etc.",
      "BQ"   => "Buddhism",
      "BR"   => "Christianity",
      "BS"   => "The Bible",
      "BT"   => "Doctrinal Theology",
      "BV"   => "Practical Theology",
      "BX"   => "Christian Denominations",
    }
  },
  "C" => {
    :name => "Auxiliary Sciences of History (General)",
    :subclasses => {
      "CB"   => "History of Civilization",
      "CC"   => "Archaeology",
      "CD"   => "Diplomatics. Archives. Seals",
      "CE"   => "Technical Chronology. Calendar",
      "CJ"   => "Numismatics",
      "CN"   => "Inscriptions. Epigraphy",
      "CR"   => "Heraldry",
      "CS"   => "Genealogy",
      "CT"   => "Biography",
    }
  },
  "D" => {
    :name => "World History and History of Europe, Asia, Africa, Australia, New Zealand, etc.",
    :subclasses => {
      "D"    => "History (General)",
      "DA"   => "Great Britain",
      "DAW"  => "Central Europe",
      "DB"   => "Austria - Liechtenstein - Hungary - Czechoslovakia",
      "DC"   => "France - Andorra - Monaco",
      "DD"   => "Germany",
      "DE"   => "Greco-Roman World",
      "DF"   => "Greece",
      "DG"   => "Italy - Malta",
      "DH"   => "Low Countries - Benelux Countries (Continued on next page)",
      "DJ"   => "Netherlands (Holland)",
      "DJK"  => "Eastern Europe (General)",
      "DK"   => "Russia. Soviet Union. Former Soviet Republics - Poland",
      "DL"   => "Northern Europe. Scandinavia",
      "DP"   => "Spain - Portugal",
      "DQ"   => "Switzerland",
      "DR"   => "Balkan Peninsula",
      "DS"   => "Asia",
      "DT"   => "Africa",
      "DU"   => "Oceania (South Seas)",
      "DX"   => "Gypsies",
    }
  },
  "E" => {
    :name => "History of America, United States",
  },
  "F" => {
    :name => "Local History of the United States and British, Dutch, French, and Latin America",
  },
  "G" => {
    :name => "Geography, Anthropology, Recreation",
    :subclasses => {
      "G"  => "Geography (General). Atlases. Maps",
      "GA" => "Mathematical geography. Cartography",
      "GB" => "Physical geography",
      "GC" => "Oceanography",
      "GE" => "Environmental Sciences",
      "GF" => "Human ecology. Anthropogeography",
      "GN" => "Anthropology",
      "GR" => "Folklore",
      "GT" => "Manners and customs (General)",
      "GV" => "Recreation. Leisure",
    }
  },
  "H" => {
    :name => "Social Sciences",
    :subclasses => {
      "H"  => "Social sciences (General)",
      "HA" => "Statistics",
      "HB" => "Economic theory. Demography",
      "HC" => "Economic history and conditions",
      "HD" => "Industries. Land use. Labor",
      "HE" => "Transportation and communications",
      "HF" => "Commerce",
      "HG" => "Finance",
      "HJ" => "Public finance",
      "HM" => "Sociology (General)",
      "HN" => "Social history and conditions. Social problems. Social reform",
      "HQ" => "The family. Marriage. Women",
      "HS" => "Societies: secret, benevolent, etc.",
      "HT" => "Communities. Classes. Races",
      "HV" => "Social pathology. Social and public welfare. Criminology",
      "HX" => "Socialism. Communism. Anarchism",
    }
  },
  "J" => {
    :name => "Political Sciences",
    :subclasses => {
      "J"  => "General legislative and executive papers",
      "JA" => "Political science (General)",
      "JC" => "Political theory",
      "JF" => "Political institutions and public administration",
      "JJ" => "Political institutions and public administration (North America)",
      "JK" => "Political institutions and public administration (United States)",
      "JL" => "Political institutions and public administration (Canada, Latin America, etc.)",
      "JN" => "Political institutions and public administration (Europe)",
      "JQ" => "Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.)",
      "JS" => "Local government. Municipal government",
      "JV" => "Colonies and colonization. Emigration and immigration. International migration",
      "JX" => "International law, see JZ and KZ (obsolete)",
      "JZ" => "International relations",
    }
  },
  "K" => {
    :name => "Law",
    :subclasses => {
      "K"       => "Law in general. Comparative and uniform law. Jurisprudence",
      "KB"      => "Religious law in general. Comparative religious law. Jurisprudence",
      "KBM"     => "Jewish law",
      "KBP"     => "Islamic law",
      "KBR"     => "History of canon law",
      "KBU"     => "Law of the Roman Catholic Church. The Holy See",
      "KD-KDK"  => "United Kingdom and Ireland",
      "KDZ"     => "America. North America",
      "KE"      => "Canada",
      "KF"      => "United States",
      "KG"      => "Latin America - Mexico and Central America - West Indies. Caribbean area",
      "KH"      => "South America",
      "KJ-KKZ"  => "Europe",
      "KL-KWX"  => "Asia and Eurasia, Africa, Pacific Area, and Antarctica",
      "KZ"      => "Law of nations",
    }
  },
  "L" => {
    :name => "Education",
    :subclasses => {
      "L"  => "Education (General)",
      "LA" => "History of education",
      "LB" => "Theory and practice of education",
      "LC" => "Special aspects of education",
      "LD" => "Individual institutions - United States",
      "LE" => "Individual institutions - America (except United States)",
      "LF" => "Individual institutions - Europe",
      "LG" => "Individual institutions - Asia, Africa, Indian Ocean islands, Australia, New Zealand, Pacific islands",
      "LH" => "College and school magazines and papers",
      "LJ" => "Student fraternities and societies, United States",
      "LT" => "Textbooks",
    }
  },
  "M" => {
    :name => "Music",
    :subclasses => {
      "M"  => "Music",
      "ML" => "Literature on music",
      "MT" => "Instruction and study",
    }
  },
  "N" => {
    :name => "Fine Arts",
    :subclasses => {
      "N"  => "Visual arts",
      "NA" => "Architecture",
      "NB" => "Sculpture",
      "NC" => "Drawing. Design. Illustration",
      "ND" => "Painting",
      "NE" => "Print media",
      "NK" => "Decorative arts",
      "NX" => "Arts in general",
    }
  },
  "P" => {
    :name => "Language and Literature",
    :subclasses => {
      "P"  => "Philology. Linguistics",
      "PA" => "Greek language and literature. Latin language and literature",
      "PB" => "Modern languages. Celtic languages",
      "PC" => "Romanic languages",
      "PD" => "Germanic languages. Scandinavian languages",
      "PE" => "English language",
      "PF" => "West Germanic languages",
      "PG" => "Slavic languages and literatures. Baltic languages. Albanian language",
      "PH" => "Uralic languages. Basque language",
      "PJ" => "Oriental languages and literatures",
      "PK" => "Indo-Iranian languages and literatures",
      "PL" => "Languages and literatures of Eastern Asia, Africa, Oceania",
      "PM" => "Hyperborean, Indian, and artificial languages",
      "PN" => "Literature (General)",
      "PQ" => "French literature - Italian literature - Spanish literature - Portuguese literature",
      "PR" => "English literature",
      "PS" => "American literature",
      "PT" => "German literature - Dutch literature - Flemish literature since 1830 -Afrikaans literature - Scandinavian literature - Old Norse literature: Old Icelandic and Old Norwegian - Modern Icelandic literature - Faroese literature - Danish literature - Norwegian literature - Swedish literature",
      "PZ" => "Fiction and juvenile belles lettres",
    }
  },
  "Q" => {
    :name => "Science",
    :subclasses => {
      "Q"  => "Science (General)",
      "QA" => "Mathematics",
      "QB" => "Astronomy",
      "QC" => "Physics",
      "QD" => "Chemistry",
      "QE" => "Geology",
      "QH" => "Natural history - Biology",
      "QK" => "Botany",
      "QL" => "Zoology",
      "QM" => "Human anatomy",
      "QP" => "Physiology",
      "QR" => "Microbiology",
    }
  },
  "R" => {
    :name => "Medicine",
    :subclasses => {
      "R"  => "Medicine (General)",
      "RA" => "Public aspects of medicine",
      "RB" => "Pathology",
      "RC" => "Internal medicine",
      "RD" => "Surgery",
      "RE" => "Ophthalmology",
      "RF" => "Otorhinolaryngology",
      "RG" => "Gynecology and obstetrics",
      "RJ" => "Pediatrics",
      "RK" => "Dentistry",
      "RL" => "Dermatology",
      "RM" => "Therapeutics. Pharmacology",
      "RS" => "Pharmacy and materia medica",
      "RT" => "Nursing",
      "RV" => "Botanic, Thomsonian, and eclectic medicine",
      "RX" => "Homeopathy",
      "RZ" => "Other systems of medicine",
    }
  },
  "S" => {
    :name => "Agriculture",
    :subclasses => {
      "S"  => "Agriculture (General)",
      "SB" => "Plant culture",
      "SD" => "Forestry",
      "SF" => "Animal culture",
      "SH" => "Aquaculture. Fisheries. Angling",
      "SK" => "Hunting sports",
    }
  },
  "T" => {
    :name => "Technology",
    :subclasses => {
      "T"  => "Technology (General)",
      "TA" => "Engineering (General). Civil engineering",
      "TC" => "Hydraulic engineering. Ocean engineering",
      "TD" => "Environmental technology. Sanitary engineering",
      "TE" => "Highway engineering. Roads and pavements",
      "TF" => "Railroad engineering and operation",
      "TG" => "Bridge engineering",
      "TH" => "Building construction",
      "TJ" => "Mechanical engineering and machinery",
      "TK" => "Electrical engineering. Electronics. Nuclear engineering",
      "TL" => "Motor vehicles. Aeronautics. Astronautics",
      "TN" => "Mining engineering. Metallurgy",
      "TP" => "Chemical technology",
      "TR" => "Photography",
      "TS" => "Manufactures",
      "TT" => "Handicrafts. Arts and crafts",
      "TX" => "Home economics",
    }
  },
  "U" => {
    :name => "Military Science",
    :subclasses => {
      "U"  => "Military science (General)",
      "UA" => "Armies: Organization, distribution, military situation",
      "UB" => "Military administration",
      "UC" => "Maintenance and transportation",
      "UD" => "Infantry",
      "UE" => "Cavalry. Armor",
      "UF" => "Artillery",
      "UG" => "Military engineering. Air forces",
      "UH" => "Other services",
    }
  },
  "V" => {
    :name => "Naval Science",
    :subclasses => {
      "V"  => "Naval science (General)",
      "VA" => "Navies: Organization, distribution, naval situation",
      "VB" => "Naval administration",
      "VC" => "Naval maintenance",
      "VD" => "Naval seamen",
      "VE" => "Marines",
      "VF" => "Naval ordnance",
      "VG" => "Minor services of navies",
      "VK" => "Navigation. Merchant marine",
      "VM" => "Naval architecture. Shipbuilding. Marine engineering",
    }
  },
  "Z" => {
    :name => "Bibliography, Library Science",
    :subclasses => {
      "Z"   => "Books (General). Writing. Paleography. Book industries and trade. Libraries. Bibliography",
      "ZA"  => "Information resources (General)",
    }
  }
}