Computer bus

system that transfers data between components within a computer

A computer bus (often simply called bus) is part of most computers. Its role is to transfer data, signals, or power between some of the components that make up a computer.

Computer system bus connects the computer parts

The size or width of a bus is how many bits it carries in parallel. Common bus sizes are: 4 bits, 8 bits, 12 bits, 16 bits, 24 bits, 32 bits, 64 bits, 80 bits, 96 bits, and 128 bits. Computers use such buses to link:

Drives are usually connected by Serial ATA or the earlier ATAPI bus. USB and Firewire connections go to printers and other peripheral devices.