The OX16PCI95x PCI Parallel Port is a parallel port controller card used in computers to add parallel port functionality via a PCI slot. Parallel ports are commonly used to connect older devices such as printers, scanners, or external drives that require a parallel connection. The OX16PCI95x chip is a specific model used in PCI-to-parallel-port adapter cards, and the Windows 2000 driver is necessary for the operating system to recognize and properly communicate with the hardware.