Computer Hardware Terms, Glossary and Dictionary

Expansion slot is the slot located inside a computer on the motherboard or riser board that allows additional boards to be connected to it. The main types of IBM compatible expansion slots found are ISA, EISA, VESA, PCI, AGP, AMR, and CNR. Expansion slot allows a circuit board to be inserted to add new capabilities to the computer. Nearly all personal computers except portables contain expansion slots for adding more memory, graphics capabilities, and support for special devices. The boards inserted into the expansion slots are called expansion boards, expansion cards, cards, add-ins, and add-ons.

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expansion slot