A keyboard is a human interface device which is represented as a matrix of buttons. Each button, or key, can be used to either input an alphanumeric character to a computer, or to call upon a particular function of the computer. … 展开

Some devices allow many continuous degrees of freedom as input. These can be used as pointing devices, but are generally used in ways … 展开

Video input devices are used to digitize images or video from the outside world into the computer. The information can be stored in a multitude of formats depending on the user's requirement. 展开

A pointing device allows a user to input spatial data to a computer. It is commonly used as a simple and intuitive way to select items on a … 展开

A sensor is an input device which produces data based on physical properties.
Sensors are commonly found in mobile devices to … 展开

Input devices, such as buttons and joysticks, can be combined on a single physical device that could be thought of as a composite device. Many gaming devices have controllers like this. Technically mice are composite devices, as they both track movement and provide … 展开

Voice input devices are used to capture sound. In some cases, an audio output device can be used as an input device, in order to capture produced sound. Audio input devices allow a user to send audio info to a computer for processing, recording, or carrying out … 展开