The IBM Automatic Sequence Controlled Calculator (ASCC) was presented to Harvard University on August 7, 1944. The ASCC was over 51 feet long and 8 feet high. It contained 3,300 relay components, 2,200 counter wheels and weighed over 5 tons. Work on the development of the ASCC was done by Howard Aiken, Clair D. Lake, Frank E. Hamilton, Benjamin M. Durfee and James W. Bryce. The machine, which was operational for over 15 years, was later known as the Harvard Mark I.