Devices for communication between computers, such as modems and network cards, typically perform both input and output operations. 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. JSTOR ( November 2019) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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