Parallel transmission is a method of sending multiple bits of data simultaneously over multiple channels. This technique uses several wires or pathways, allowing for faster data transfer compared to serial transmission, where bits are sent one after another. It is commonly used in computer systems and communication devices to improve efficiency. In parallel transmission, each bit of data is transmitted on a separate wire, which can lead to increased speed. However, it can also result in issues like signal degradation and timing problems over longer distances. Devices such as printers and computer buses often utilize parallel transmission for quick data exchange.