The PCI Bus (Peripheral Component Interconnect Bus) is a standard interface used to connect various hardware components in a computer. It allows devices like graphics cards, network cards, and storage controllers to communicate with the computer's central processing unit (CPU) and memory. The PCI Bus supports multiple devices on a single bus, enabling efficient data transfer and resource sharing. Introduced in the early 1990s, the PCI Bus has evolved over time, leading to faster versions like PCI Express (PCIe). This evolution has improved performance and reduced latency, making it suitable for modern computing needs. The PCI Bus remains a fundamental part of computer architecture.