IBM 513
Encyclopedia
The IBM 513 Reproducing Punch (photo) was a card
Punched card
A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions...

 punching machine developed by IBM
IBM
International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

. The machine could perform these functions:
  • Reproducing all or part of the data on a deck of punched cards.
  • Gang punching—copying punched information from a master card.
  • Summary punching—punching a total or new balance card amounts which have been accumulated in the accounting machine.
  • Mark sensing—the operation by which information recorded in the form of pencil marks is turned into punches on the cards.


Mark sensing allowed a person to enter data to be used in punched-card data processing without using a keypunch machine. It was used for tasks such as recording long distance calls or electric meter readings.

External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK