An Input Devices is any hardware device that send a data a computer, allowing you to interact with and control it. The mostly commonly used or primary input device on a computer keyboard or Mouse. What an input device sends input data to a computer depends on the device. Additionally, all input devices send data from the device over a wireless transmission or cable to the computer. For example, as you move a computer mouse, the data it sends to the computer is the X and Y axis movements that the computer uses to display the mouse cursor on the screen.