Any type of bank card.
A plastic card, usually with a magnetic strip or an embedded microchip, connected to a credit account and used to buy goods or services.
A card used to aid rote memorization. One side of the card contains data of one kind, or a question, and the other side contains the associated response which one wants to memorize. For example, one side could contain an English word, and the other side the Spanish translation.
A solid-state digital memory storage format, commonly found on computers, digital cameras and cellphones.