The PCI OHCI-kompatibler IEEE 1394-Hostcontroller is a driver for a PCI-based IEEE 1394 host controller that allows communication with devices using the IEEE 1394 standard (commonly known as FireWire). This interface was widely used for connecting devices like digital cameras, external hard drives, and other multimedia devices to a computer. The "OHCI" stands for Open Host Controller Interface, which is a specification for the interface between the computer's motherboard (or PCI/PCIe card) and IEEE 1394 devices.