In computing, an image scanner—often abbreviated to just scanner, although the term is ambiguous out of context (barcode scanner, CAT scanner, etc.) — is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image.
Commonly used in offices are variations of the desktop flatbed scanner where the document is placed on a glass window for scanning. Hand-held scanners, where the device is moved by hand, have evolved from text scanning “wands” to 3D scanners used for industrial design, reverse engineering, test and measurement, orthotics, gaming, and other applications.
Automotive Scan tool
An automotive scan tool (scanner) is an electronic tool used to interface with, diagnose and, sometimes, reprogram vehicle control modules. There are many types from just as many manufacturers, one of the most familiar being the Snap-On “brick” or MT2500/MTG2500. Snap-On, Hella Gutmann Solutions, OTC/SPX, Xtool India, Autel, Launch, Vetronix/Bosch, and several other companies produce various types of scan tools, from simple code readers to highly capable bi-directional computers with programming capabilities.
The scan tool is connected to the vehicle’s data link connector (DLC) and, depending on the particular tool, may only read out diagnostic trouble codes or DTCs (this would be considered a “code reader”) or may have more capabilities. Actual scan tools will display a live data stream.