What are peripheral devices? What are the types of peripheral devices? Give Example.

Peripheral Device:

Those devices which are not required or essential for a computer system to boot and run are called peripheral devices. A computer system has four categories of computer hardware among which mostly all I/O devices are peripheral devices. Though there are other devices which are both input and output devices and most of them are peripheral devices. Along with these external and storage devices are also peripherals when the system already has its default storage and memory units.

Peripheral devices help in better use of the computer system, but the computer system itself can run without them.

Examples: Mouse, Keyboard, Sound System etc.