Definitions for "Expansion bus"
Keywords:  pci, bus, isa, buses, peripheral
An extension of the common electrical bus which accepts the expansion boards that control the video display, disks, and other peripherals. (See also bus.)
An extension of the main computer bus that includes expansion slots for use by compatible adapters, such as including memory boards, video adapters, hard disk controllers, and SCSI interface cards.
An I/O bus that provides the ability to add peripherals to a PC.   ISA and PCI are examples of an expansion bus.
forms the highway system that moves information coming from and going to devices outside the motherboard like your microphone or printer