Computer Collection Library

IBM 604 Electronic Calculator


The IBM 604, introduced in 1948, was IBM's second commercial electronic calculator and introduced pluggable modules for easier service. It could add, subtract, multiply and divide numbers from punched cards, with up to 40 program steps repeated for each card. The 604 itself was the electronics unit, with the 521 card reader and punch for I/O.

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Last updated 05 Aug 2005


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