- graphic tablets
- cameras
- video capture hardware
- trackballs
- barcode reader
- digital camera
- gamepad
- joystick
- keyboard
- microphone
- MIDI keyboard
- mouse (pointing device)
- scanner
- webcam
- touchpads
- pen input
- electronic whiteboard
- magnetic key cards
O/P Devices
- monitor
- printers
- plotters
- projectors
- LCD projection panels
- computer output microfilm (COM)
- speakers
- radio
Both
- modems
- network cards
- touch screen
- headsets (speakers <-- output and microphone <-- input)
- fax
- audio cards/sound card
- USB
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