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Serial port

Serial ports were the original ports used to connect peripherals to a computer.
The data is transferred one bit (an electrical signal, either a 1 or a 0) after another down the signal wire and into the computer.
Serial ports have been left behind by the much faster USB and Firewire ports.

A Serial bus is an electronic pathway along which we can transmit data. For example, on modern plant vehicles, there are a number of stations (gear shift control, engine management, dashboard instruments, anti-lock brakes). These stations all need to communicate and influence each other. They do this over the bus. Because the electronic data is transmitted one bit after another over this bus, it is known as a serial bus.

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