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  • Input devices carry input to the computer for performing tasks.

  • Output devices are used to give output to the user

  • Input devices are mouse, keyboard, joy stick, scanners etc.

  • Output devices are printers, monitors, speakers etc.

  • Printers are of two broad types, namely impact printers and non-impact printers.

  • RAM is a volatile memory, where as ROM is a non-volatile memory.

  • EPROM is a electrically programmable read only memory.

  • Ports are used to connect external devices.

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