input/output device, also known as computer peripheral,      any of various devices (including sensors) used to enter information and instructions into a computer for storage or processing and to deliver the processed data to a human operator or, in some cases, a machine controlled by the computer. Such devices make up the peripheral equipment of modern digital computer systems.

 

 

An input device converts incoming data and instructions into a pattern of electrical signals in binary code that are comprehensible to a digital computer .

 

 An output device reverses the process, translating the digitized signals into a form intelligible to the user. At one time punched-card and paper-tape readers were extensively used for inputting, but these have now been supplanted by more efficient devices.

input

•  Graphics Tablets
•  Cameras
•  Video Capture Hardware
•  Trackballs  
•  Barcode reader
•  Digital camera
•  Gamepad
•  Joystick
•  Keyboard
•  Microphone
•  MIDI keyboar
•  Mouse (pointing device)
• Scanner
• Webcam
• Touchpads
• Pen Input
•  Microphone
• Electronic Whiteboard

output

• Monitor
• Printers
• Plotters
• Projector
• LCD Projection Panels
• Computer Output Microfilm
• Speaker
• Fax Machine
• Headphones