A PCI DVB-S Device driver refers to the software that enables your computer to communicate with a PCI-based Digital Video Broadcasting - Satellite (DVB-S) card. These cards are used to receive satellite television signals on a computer. The DVB-S standard is typically used for receiving satellite TV broadcasts, and the PCI card is a hardware device that connects to your computer's motherboard.

In simpler terms, the PCI DVB-S device is a piece of hardware that allows your computer to act as a satellite TV receiver. The driver software acts as a bridge between the hardware and your operating system, ensuring that you can use the card to watch TV, record shows, or receive satellite data.