Harvard Mark-I

Harvard Mark-I

In 1944, Howard Aiken Prof. of Harvard university and designed and built by IBM, the Havard Mark-1 was a room sized, relay based calculator, it was a electromechanical computer and named as IBM ASCC (Automatic Sequence Controlled Calculator). It is also called MARK-I. It was the first automatic machine where decimal number system was used. It was a very giant machine. The machine had 51 foot long camshaft which was 8 feet high and 3 feet wide that synchronised machine's thousands of  parts. It weighed 35 tons and had 500 miles of wires. It had built in programs to handle logarithms and trigonometric functions.