An Input device is a hardware component that is used to enter data and instructions into a computer.
There are three general types of Input devices:
1)Keyboards
2)Pointing devices(e.g:mouse,pointing stick,touch screen,graphic tablet, joy stick etc)
3)Source data entry devices(e.g:(1)scaning devices i.e;barcode reader,magnetic-ink character recognition reader(MICR), smart cards, imaging system, etc and (2)audio/video devicesi.e; audio input devices, video input devices and digital camera)
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Examples of Output devices:- Monitor, Printer, scanner. and examples of input devices :- Key pad, mouse, joystick, light pen.