Harvard Mark I
The Harvard Mark I
also known as the IBM ASCC
, the Automatic Sequence Controlled Calculator
was long thought to be the first large scale automatic digital computer
, until after World War II
by Konrad Zuse
The Mark I was devised by Howard H. Aiken, created at IBM, shipped to Harvard in February 1944 and formally delivered there on August 7, 1944.
The building elements of the Mark I were switches, relays, rotating shafts, and clutches. It was built using more than 750,000 components, amounting to a size of 50 feet in length, 8 feet in height and a weight of about 5 tons.
The most famous operator / programmer of the Harvard Mark I was Grace Hopper.
Other universities have their "Mark I" computers as well, but the Harvard Mark I is generally described as "the" Mark I.