Peripherals devices

In addition, hardware can include external components of a computer system. The following are either standard or very common.

Includes various input and output devices, usually external to the computer system

Input:

* Text input devices
o Keyboard - a device to input text and characters by depressing buttons (referred to as keys), similar to a typewriter. The most common English-language key layout is the QWERTY layout.
* Pointing devices
o Mouse - a pointing device that detects two dimensional motion relative to its supporting surface.
o Trackball - a pointing device consisting of an exposed portruding ball housed in a socket that detects rotation about two axes.
* Gaming devices
o Joystick - a general control device that consists of a handheld stick that pivots around one end, to detect angles in two or three dimensions.
o Gamepad - a general game controller held in the hand that relies on the digits (especially thumbs) to provide input.
o Game controller - a specific type of controller specialized for certain gaming purposes.
* Image, Video input devices
o Image scanner - a device that provides input by analyzing images, printed text, handwriting, or an object.
o Webcam - a low resolution video camera used to provide visual input that can be easily transferred over the internet.
* Audio input devices
o Microphone - an acoustic sensor that provides input by converting sound into an electrical signal

Output:

* Image, Video output devices
o Printer - a peripheral device that produces a hard (usually paper) copy of a document.
o Monitor - device that displays a video signal, similar to a television, to provide the user with information and an interface with which to interact.
* Audio output devices
o Speakers - a device that converts analog audio signals into the equivalent air vibrations in order to make audible sound.
o Headset - a device similar in functionality to computer speakers used mainly to not disturb others nearby.