The Harvard Mark I, or IBM Automatic Sequence Controlled Calculator (ASCC), was a general-purpose electromechanical computer used in the war effort during the last part of World War II.
One of the first programs to run on the Mark I was initiated on 29 March 1944[1] by John von Neumann. At that time, von Neumann was working on the Manhattan Project, and needed to determine whether implosion was a viable choice to detonate the atomic bomb that would be used a year later. The Mark I also computed and printed mathematical tables, which had been the initial goal of British inventor Charles Babbage for his "analytical engine" in 1837.
The Mark I was disassembled in 1959; part of it was given to IBM, part went to the Smithsonian Institution, and part entered the Harvard Collection of Historical Scientific Instruments. For decades Harvard's portion was on display in the lobby of the Aiken Computation Lab. About 1997 it was to the Harvard Science Center, and in 2021 it was moved again, to the lobby of Harvard's new Science and Engineering Complex in Allston, Massachusetts.[2]
https://en.wikipedia.org/wiki/Harvard_Mark_I
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