1) Input devices are pieces of computer hardware and equipment that are used to provide data and send signals to processing systems which are also computers. Keyboards, pointers, graphics controlling devices, and game controllers are all examples of input devices.
2) Output devices are devices that communicate results of data in processing system (computer) and make them visible to the outside world. Examples of output devices are speakers, headphones, the screen/monitor, and the printer.
3) Storage devices are devices used to record components of a computer and also processes and information. It is an important device for computers, and one type of storage device can be identified as RAM (Random Access Memory).
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