what is an input to a process?
Inputs are the signals or data received by the system and outputs are the signals or data sent from it. The term can also be used as part of an action; to perform I/O is to perform an input or output operation. I/O devices are used by a human (or other system) to communicate with a computer. For instance, a keyboard or mouse is an input device for a computer, while monitors and printers are output devices.