Definition: DIGITAL COMMUNICATIONS BUS
A digital bus is the set of wires, cables or tracks on a printed-circuit board that connects 2 or more digital components or systems together. Each wire carries one bit of information and such a bus usually have multiple wires, thus the bus is capable of sending and receiving multiple bits simultaneously (in parallel). If a bus only sends 1 bit at a time it is said to send the information serially.
Also known as: serial bus, parallel bus, data bus, communications bus, digital bus.
Also see: Digital Electronic Communications Protocol, Digital Electronics