How Do Handheld Scanners Work?. Handheld scanners are smaller, portable versions of their desktop cousins. Like a flatbed scanners, they scan documents, drawings and other flat media, turning them ...

The Drive's DIYers show you what an OBD2 scanner is, how it works, how to use one, and which is the best you can have in your home garage.

On a modern computer, there may be hundreds or even thousands of potential host programs. Scanning every one of these programs every time the virus scanner is run would take an unreasonably long time.

Amsterdam's airport is moving ahead with full-body scanners after trying new software that projects a stylized image -- rather than an actual picture -- onto a computer screen.