- Keyboard
- Touch (capacitive touch, alternatives?)
- Voice (offline, online)
- OCR
- Image Analysis (e.g. Kinnect, face recognition)
- Sensor input (buttons, motion, temperature, light etc)
- RFID/NFC <-- needs investigation & prototyping
- Feeds & Events (e.g. news feeds, weather APIs etc)
- Time: clocks, alarms, countdowns
- Presence
- LEDs: color, blinking/frequency, brightness, animations
- Servos, motors, actuators
- Sounds: tones, music, beeps, buzzing
- Haptic: vibrate
- Smells
- LCD Screens
- E-Ink displays