(Universal Serial Bus) USB is a plug-and-play interface between a computer and add-on devices. With USB, a new device can be added to your computer without having to add an adapter card or even having to turn the computer off. The USB peripheral bus standard was developed by Compaq, IBM, DEC, Intel, Microsoft, NEC, and Northern Telecom and the technology is available without charge for all computer and device vendors. This, in 1997 standardized interface, will replace the conventional connecting systems like the parallel and serial data interface, or also the special connectors for keyboard and bus mouse in the medium term.