Harvard Mark II
The Harvard Mark II, also known as the Aiken Relay Calculator, 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 and Grace Hopper worked together under Aiken to build and program the Mark II
| Also known as | Aiken Relay Calculator |
|---|---|
| Developer | Howard Aiken, Edmund Berkeley, and Grace Hopper |
| Release date | 1947 |
| Mass | 50,000 lb (23,000 kg) |
| Predecessor | Harvard Mark I |
| Successor | Harvard Mark III |
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