What is Peripheral equipment?
{{about|a computer device|the term describing the edges of a field of vision|Peripheral vision}} [[Image:Tablet mouse.svg|thumb|upright|Peripheral equipment]] '''Peripheral equipment''' (also called: '''input and output devices''') connects a computer to other things. It gives a computer system more [[wikt:feature|features]]. Input is anything that goes [[in]] and output is anything that goes [[out]]. Any device for the computer that the computer can work without is peripheral equipment. This equipment is always separated from the central processing unit ([[CPU]]) by a [[device controller]]. Peripheral equipment is necessary for people to interact with a [[computer]] [[system]]. Some peripheral equipment displays information (such as a [[computer monitor]]). Some peripherals, such as [[touchscreen]]s, work for both input and output. Peripheral equipment is often labelled '''I/O device''' (Input/Output device). I/O devices are connected to a device controller which is connected to the [[electronics]] in the computer system. An example of an [[output device]] is a set of computer speakers. Computer speakers are plugged into a device controller called an [[audio]] device. The device is connected to the rest of the system inside. An example of an [[input device]] is a [[computer mouse]]. It is connected in the same way as an output device. Most peripherals connect by [[cable]] but some connect by [[Bluetooth]] radio. One peripheral device can be connected to many systems. Sometimes extra [[memory]] devices such as a second [[hard disk]] can be called peripheral equipment. People who [[programming|make computer programs]] call everything except the processor and main memory an I/O device. To an engineer working on the [[design]] of a processor, everything except the processor is called an I/O device. [[Image:Apple magsafe tight.jpg|thumb|250px|Small [[laptop]] computers can also connect to peripheral equipment]] ==Input devices== An [[input device]] is anything that puts [[information]] inside a computer. It is