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IBM 523 gang summary punch

The IBM 523 gang summary punch made its debut on February 17, 1949.

The IBM 523 gang summary punch made its debut on February 17, 1949.
The IBM 523 gang summary punch made its debut on February 17, 1949. When attached to an IBM 400-series accounting machine, the 523 punched summary cards for various totals at the rate of 100 cards a minute. Gang punching and summary punching operations could be performed simultaneously. The last model of the 523 was withdrawn from marketing on December 1, 1975. (VV4012)

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