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The IBM 721 card punch was formally announced on May 21, 1952. It was used for punching
answers to problems and other data onto IBM punched cards for processing by the IBM 701
Data Processing System. Punched card input was at 600 digits per second and 100 cards a
minute.
This machine could also be used as an automatic set-up gang punch when not employed in
the 701 system. It rented for $200 a month in 1955.
The 721 was withdrawn from marketing on July 14, 1969.
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