Hardware components of the PC
Computer Buses
The PCI bus

Peripheral Component Interconnect (PCI) is the name of a popular interface bus design that is now the standard feature on PC motherboards.

The PCI bus provides both a 32-bit and 64-bit wide data bus that allows for impressive data throughput rates between the PCI adapter and the system bus. The edge connector of PCI adapter cards has a unique design as shown below.