Any piece of external equipment that is attached to a PC, rather than built into it, is termed a PERIPHERAL DEVICE. This covers external storage devices, printers, scanners, in fact any device that enhances the capabilities of a computer system.

Forms of external storage devices. E.g. external Hard disk drive, Zip drive, and tape storage cartridge may be attached to a PC.

Most computers have Speakers attached to play music or listen to voices

Modems are widely used to connect a computer to the telephone system, and can be attached externally or internally. This connection allows the user access to use e- mail or the Internet.