IBM 513

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The IBM 513 Reproducing Punch was a card punching machine developed by IBM. 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 use din punched-card data processing without using a keypunch machine. It was used for tasks like recording long distance calls or meter readings.

[edit] References

• IBM (1945). IBM Electric Punched Card Accounting Machines, Principles of Operation, Reproducing Punches 513 and 514. 
• IBM (October, 1959). IBM Reference Manual: 513, 514 Reproducing Punches. A24-1002-2. 

[edit] External links

• Columbia University Computing History: IBM Reproducing/Summary Punches.