IBM Harvard Mark I computer inventors, 1940s

IBM Harvard Mark I computer inventors, 1940s

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Credit: IBM RESEARCH/SCIENCE PHOTO LIBRARY

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Caption: IBM Harvard Mark I computer inventors, in the 1940s, in front of the pioneering computer. Pictured (from left) Francis Hamilton (IBM engineer), Clair Lake (IBM engineer) Howard Aiken (Harvard professor) and Benjamin Durfee (IBM engineer). All four were inducted into the 2014 National Inventors Hall of Fame for their work on the Automatic Sequence Controlled Calculator (ASCC). This was the first automatic digital calculator able to retain mathematical rules in its memory and not require reprogramming to solve a new set of problems. The Harvard Mark I, used at the University of Harvard, USA, was officially called the IBM Automatic Sequence Controlled Calculator.

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