1948

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IBM 604 c.1948

The IBM 604 Electronic Calculating Punch with Type 521 Card Reader/Punch, 1948. The 604 performed addition, subtraction, multiplication, and division hundreds of times faster than any of IBM's earlier electromechanical machines, and was the first IBM product to use modular vacuum-tube based pluggable units, later used in IBM's NORC and 701 computers.
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