INPUT

__// Input //__ An input device converts incoming data and instructions into a pattern of electrical signals in binary code that are comprehensible to a digital computer.
 * 1) Many input devices can be classified according to:
 * modality of input (mechanical motion, audio, visual, etc.)
 * the input is discrete or continuous
 * the number of degrees of freedom involved (e.g. two-dimensional traditional mice)

2. **Imaging/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.



3. **Audio** input devices are used to either capture or create sound. In some cases, an audio output device can be used as an input device, in order to capture produced sound.



4. **Composite** Input devices, such as buttons and joysticks, can be combined on a single physical device that could be thought of as a composite device. Technically mice are composite devices, as they both track movement and provide buttons for clicking, but composite devices are generally considered to have more than two different forms of input.