Punched card available, e.g. "80-column card". A sequence of cards that is input to or output from some step in an application's processing is called a "card deck" or simply "deck". The rectangular, round, or oval bits of paper punched out were called chad ("chads") or "chips" (in IBM usage). Sequential card columns allocated for a specific use, such as names, addresses, multi-digit numbers, etc., are known as a "field". The first card of a group of cards, containing fixed or indicative information for that group, is known as a "master card". Cards that are not master cards are "detail cards". The
Pay card Pay card A pay card is a notation system or device used in some nightclubs to indicate the value of the drinks or services (like coat check fees) consumed by or used by a patron. Pay cards are chip cards, punch cards, or a piece of paper card with several fields which servers mark with special pens, pencils, or clippers. When patrons leaves the nightclub, they remit their pay card to a cashier, who decodes it, and the required payment is displayed on the checkout box. The pay card is most often the property of the nightclub and stays in