- A set of conductors which serve as a channel which provides parallel data transfer from one part of a computer to another. An example is the local bus, which is the pathway between the CPU, the memory, and high-speed peripherals. A bus is subdivided into two parts: the address bus, which identifies specific locations of stored data, and the data bus, which transfers the data. The width of the bus determines the amount of data which can be transferred at a time. A 256-bit bus, for example, can transfer 256 bits at a time. The clock speed determines how fast these transfers take place. Also called bus (1).