![]() However, serial ports are still frequently used in applications demanding simple, low-speed interfaces, such as industrial automation systems, scientific instruments, point of sale systems and some industrial and consumer products. ![]() Modern consumer personal computers (PCs) have largely replaced serial ports with higher-speed standards, primarily USB. While interfaces such as Ethernet, FireWire, and USB also send data as a serial stream, the term serial port usually denotes hardware compliant with RS-232 or a related standard, such as RS-485 or RS-422. Throughout most of the history of personal computers, data has been transferred through serial ports to devices such as modems, terminals, various peripherals, and directly between computers. ![]() This is in contrast to a parallel port, which communicates multiple bits simultaneously in parallel. On computers, a serial port is a serial communication interface through which information transfers in or out sequentially one bit at a time. A male D-subminiature connector used for a serial port on an IBM PC compatible computer along with the serial port symbol
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