Main article: Peripheral
Input and output devices are typically housed externally to the main computer chassis. The following are either standard or very common to many computer systems.
Input
Main article: Input device
- Text input devices
- Keyboard - a device to input text and characters by depressing buttons (referred to as keys or buttons).
- Pointing devices
- Mouse - a pointing device that detects two dimensional motion relative to its supporting surface.
- Optical Mouse - uses light to determine mouse motion.
- Trackball - a pointing device consisting of an exposed protruding ball housed in a socket that detects rotation about two axes.
- Touchscreen - senses the user pressing directly on the display
- Mouse - a pointing device that detects two dimensional motion relative to its supporting surface.
- Gaming devices
- Joystick - a control device that consists of a handheld stick that pivots around one end, to detect angles in two or three dimensions and reports its angle or direction to the device it is controlling.
- Game pad - a hand held game controller that relies on the digits (especially thumbs) to provide input.
- Game controller - a specific type of controller specialized for certain gaming purposes.
- Image, Video input devices
- Image scanner - a device that provides input by analyzing images, printed text, handwriting, or an object.
- Web cam - a video camera used to provide visual input that can be easily transferred over the internet.
- Audio input devices
- Microphone - an acoustic sensor that provides input by converting sound into electrical signals.
Output
Main article: Output device
- Printer - a device that produces a permanent human-readable text of graphic document.
- Speakers - typically a pair of devices (2 channels) which convert electrical signals into audio.
- Headphones - for a single user hearing the audio.
- Monitor - an electronic visual display with textual and graphical information from the computer.
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