My Definition: Devices that are connected to the computer by cables or even wireless and
are used to help navigate the computer.
Online Definition: A hardware device that is connected to a computer, usually by a cable.
Keyboards and mice are peripherals that help us “input” information.
Printers and monitors are peripherals that “output” information.
Definition Link: http://www.tekmom.com/buzzwords/zdperip.html
Picture Link: http://systelenterprises.com/pc-peripherals%202.gif