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Harvard Mark Computers

The series of computers built at Harvard University under the direction of Howard Aiken. The Harvard Mark I, also known as the IBM Automatic Sequence Controlled Calculator, was one of the earliest general-purpose electromechanical computers, the Mark III was partly electronic, and the Mark IV was an electronic stored-program computer built under the supervision of Howard Aiken. The Mark III was also known as ADEC, the Aiken Dahlgren Electronic Calculator.

Harvard Mark Computers
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Wikipedia: Harvard Mark II
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The Harvard Mark II, also known as the Aiken Relay Calculator, was an electromechanical computer
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Wikipedia: Harvard Mark I
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The Harvard Mark I, or IBM Automatic Sequence Controlled Calculator (ASCC), was one of the earliest general-purpose electromechanical computers 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 by John von Neumann.
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Wikipedia: Harvard Mark III
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The Harvard Mark III, also known as ADEC (for Aiken Dahlgren Electronic Calculator), was an early computer that was partially electronic and partially electromechanical.
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Harvard Mark IV, Wikipedia
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The Harvard Mark IV was an electronic stored-program computer built by Harvard University under the supervision of Howard Aiken for the United States Air Force.
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