The EF232 PCI - PARALLELDUAL SERIAL driver is associated with a PCI expansion card (typically, a parallel and dual serial port card) for adding additional parallel and serial ports (RS-232, RS-422, or RS-485) to a computer. This is often used in situations where a computer needs to interface with legacy devices, industrial equipment, or other serial-based peripherals.

The EF232 card is likely produced by EasyData, though this can vary depending on the manufacturer. The PCI part of the name indicates that it's a card that fits into the PCI slot on the motherboard, and the PARALLELDUAL SERIAL part suggests that it provides both parallel and serial communication capabilities.