Harvard Mark II

Harvard Mark II
Also known asAiken Relay Calculator
DeveloperHoward Aiken, Edmund Berkeley, and Grace Hopper
Release date1947; 77 years ago (1947)
Mass50,000 lb (23,000 kg)
PredecessorHarvard Mark I
SuccessorHarvard Mark III

The Harvard Mark II, also known as the Aiken Relay Calculator,[1][2][3] was an electromechanical computer built under the direction of Howard Aiken at Harvard University, completed in 1947. It was financed by the United States Navy and used for ballistic calculations at Naval Proving Ground Dahlgren. Computer pioneers Edmund Berkeley[4] and Grace Hopper worked together under Aiken to build and program the Mark II

  1. ^ Rife 2006, p. 93.
  2. ^ Instruments & Control Systems. Chilton Company. 1957. p. 1302.
  3. ^ Harvard Alumni Bulletin. 1948. p. 554.
  4. ^ "From Tabulators to Early Computers in the U.S. Life Insurance Industry". Center for Coordination Science @ MIT Sloan. 1946-12-31. Retrieved 2023-12-08.