Computer input or output (I/O) is the process of transferring data into or out of a computer. There are many different types of input and output devices, including keyboards, mice, touchpads, trackballs, joysticks, scanners, digital cameras, microphones, and printers.

Input devices allow you to enter data into a computer, while output devices allow you to view or print the results. Some input and output devices can be used for both purposes, such as a keyboard that can be used to type data into a computer or to enter text into a word processor.

The most common input device is the …