What is Computer bus?
[[File:Computer system bus(fixed).svg|thumb|Computer system bus connects the computer parts]] A '''computer bus''' (often simply called '''bus''') is part of most [[computer]]s. Its role is to transfer [[Information|data]], [[signal (electrical engineering)|signal]]s, or power between some of the components that make up a computer. 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: * [[CPU]] to on-board Memory * multiple CPUs in a multi-cpu system * [[Arithmetic logic unit]] to the rest of the CPU * [[hard drive]]s, [[graphics card]]s, etc. to the main system. Drives are usually connected by [[Serial ATA]] or the earlier [[Advanced Technology Attachment|ATAPI]] bus. [[USB]] and [[Firewire]] connections go to printers and other [[peripheral device]]s. {{Tech-stub}} [[Category:Computer buses| ]]