DB (D-Sub) Connectors and COM Ports A serial port on a PC is a male 9-pin connector (DE-9 D-sub). Early PCs had two 9-pin connectors or one 9-pin and one 25-pin (DB-25). On a PC, serial ports are ...

Easily Add 2 Serial Ports and 1 Parallel Port To Any Computer Add one IEEE 1284 Parallel Port on system Supports 2 x UART Serial Ports All 3 Ports Uses 1 PCI Slot ...

Learn what a USB to Serial adapter is used for, when you might need one, and whether installing a driver is required for it ...

A circuit board that contains multiple serial ports for connection to modems and other serial devices. The serial port is used as an interface by many different kinds of sensors and data ...