Functions of a Computer System: For kids and teens

A computer, whether big or small, performs five basic functions: input, output, processing, storage, and communication.

The input function allows the computer to accept data from users using input devices. Common input devices include the keyboard, mouse, scanner, and touchscreen monitor.

The output function allows the computer to release information to users through output devices. Examples include the monitor, printer, and speaker.

The processing function enables the computer to work on data entered by users. Devices that aid in processing include the Central Processing Unit (CPU), cache memory, and Random Access Memory (RAM).

The storage function allows the computer to save data and results for future use with storage devices. Common storage devices are the hard disk drive (HDD), flash drive, memory card, CD-ROM, and solid-state drive (SSD).

The communication function allows computers to exchange data and information with each other using communication devices such as the Ethernet switch, network cable, wireless router, and modem.