











The document discusses four types of motherboards: XT, AT, Baby AT, and ATX. XT motherboards are the oldest and contain slot processors, ISA slots, and a 12-pin power connector. AT motherboards have PGA sockets, SIMM slots, PCI slots, and a 20-pin power connector. Baby AT boards combine features of XT and AT. The latest motherboards are ATX, which have MPGA sockets, DDR slots, PCI/AGP slots, SATA connectors, and a 24-pin power connector.











