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 damaged by foam parties. Some unsophisticated paycards can be manipulated by the patron. Paycards give patrons an incentive to escape through emergency exits, so these, in such clubs, are safeguarded by alarms. 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