USB

USB refers to a type of connectivity between electronic devices such as computers, printers, and digital cameras. It is based on the USB standard which specifies the physical connectors (cables and ports), wiring, and data transfer protocol used to provide the connections.

USB stands for Universal Serial Bus. "Universal" refers to the objective that this standard covers all common data transfer functions. "Serial" refers to the fact that data are transferred sequentially rather than simultaneously. However, "Bus" refers to multiple parallel electrical connections each of which can transmit different signals.

The USB interface standard is the successor to the "parallel" and "serial" standards used in eary PC designs. The orignal USB 1.0 standard has been replaced with the more efficient USB 2.0 standard.