For instance, a keyboard or computer mouse is an input device for a computer, while monitors and printers are output devices. I/O devices are the pieces of hardware used by a human (or other system) to communicate with a computer. The term can also be used as part of an action to "perform I/O" is to perform an input or output operation. Inputs are the signals or data received by the system and outputs are the signals or data sent from it. ![]() ![]() In computing, input/output ( I/O, i/o, or informally io or IO) is the communication between an information processing system, such as a computer, and the outside world, possibly a human or another information processing system.
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