+A **serial port** is a physical communication interface through which data is transferred one bit at a time. This allows for simple, robust [Data Transfer](/wiki/data_transfer) over often long distances, distinct from interfaces that send multiple bits simultaneously. While largely supplanted by faster standards like [USB](/wiki/usb) in consumer devices, serial ports remain crucial for debugging, industrial control, and embedded systems.
+## See also
+- [RS-232](/wiki/rs-232)
+- [UART](/wiki/uart)
+- [Modem](/wiki/modem)
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