- A circuit board which is plugged into the bus or an expansion slot of a computer, in order to add functions or resources. common examples include graphics accelerators, sound cards, and Ethernet adapters. Also known by various other terms, including adapter card, expansion card, addon board, accessory card, and adapter (3).
- A card which holds 80 or 96 columns of data, each representing one character, used by computers with card readers. This is a practically obsolete storage medium. Also called punched card.
- synonym circuit board
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