Transmission mode that sends a number of bits simultaneously over separate lines. Usually unidirectional.
Simultaneous transmission of a data stream over multiple channels, or on different carrier frequencies on one channel. See serial transmission.
The simultaneous transmission of a group of bits over separate wires. With microcomputers, parallel transmission refers to the transmission of 1 byte (8bits). The standard connection for parallel transmission – for example, from a computer to a printer – is known as the Centronics interface.