PCI
PCI (Peripheral Component Interconnect) is a hardware bus standard for connecting peripheral devices to a computer's motherboard, enabling high-speed data transfer between the CPU and components like graphics cards, network cards, and storage controllers. It was widely used in personal computers from the 1990s to early 2000s, providing a standardized interface for expansion slots. The standard has evolved into successors like PCI Express (PCIe), which offer higher bandwidth and improved performance.
Developers should learn about PCI when working with low-level system programming, hardware interfacing, or embedded systems, as it provides foundational knowledge for understanding how devices communicate with a computer's CPU. It is particularly relevant for tasks involving device drivers, kernel development, or legacy hardware maintenance, where compatibility with older systems or specific industrial equipment might be required. Understanding PCI helps in grasping modern bus architectures like PCIe, which are essential for high-performance computing and gaming systems.