A computer is an electronic device used to process data.A computer can convert data into information that is useful to people. A computer’s hardware consists of electronic devices; the parts you can see and touch. Computer systems will include the computer along with any software and peripheral devices that are necessary to make the computer function. Every computer system, for example, requires an operating system. The term “device” refers to any piece of hardware used by the computer, such as a keyboard, monitor, modem, mouse, etc.