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.
A trading card (such as a cigarette card).
An early precursor of the business card, first produced at the beginning of the seventeenth century.