Harvard Mark I

• The Harvard Mark I was created in 1944 by Howard H. Aiken. Grace Hopper also helped program the invention.
• It assisted the U.S. Navy in calculating tables to aid in the aiming of artillery shells and bombs until the end of World War II in early 1945. It could store 23 decimal digits for a number. One of the first programs that it was used for is the Manhattan Project.
• It was superseded by electronic stored-program computers.
• Interesting Fact: It weighed five tons and consisted of about 750,000 separate parts.