• Keyboards (QWERTY, Dvorak, chord, numeric)
• Cursor keys
• mouse (1-3 buttons)
• trackballs, trackpads, joystick, 3D-mouse  
• Touch screens

• Speech input

• "Graffiti", handwriting, gestures

• Data gloves , data suits, 3D trackers

• Gaze

• Thought

• Special input devices for people with disabilities
  (e.g., foot mouse, head mouse , lip readers, etc.)

  Cater to variety of input devices