serial interface - A port on the computer that transmits data in serial form, one bit at a time, as opposed to a parallel interface which sends a number of bits side by side.Within the computer, data is transmitted over parallel lines, for greater speed; but telephone lines require serial transmission.The serial interface converts data from a parallel to a serial arrangement for sending to the modem.A serial interface is also used to connect a mouse, a scanner, and certain printers;
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