Mark I


  • It was built in Harvard University by Howard H. Aiken during 1937 AD.

  • This device contained 50000 parts and was strung with about 500miles of wires.

  • Its primary function is to carry out addition, subtraction, multiplication, division and reference to previous results.

  • Its features are as follows:

  1. It was 51 feet long, 8 feet tall and 2 feet wide which weighed 4500 Kg. 

  2. It could do three additions or subtractions in a second.

  3.  A multiplication took six seconds, a division took 15.3 seconds, and a logarithm or a trigonometric function took over one minute.

  4. It consumed a lot of electricity and emitted a lot of heat.

  5. It was also called IBMASCC (International Business Machine Automatic Sequence Control Calculator).

    photo credit:history-computer.com

  6. This project was a joint partnership between IBM and Harvard University.

  7. It can automatically perform a sequence of arithmetic operations: addition, subtraction, multiplications, division and table reference.

  8. It could add or subtract two of numbers in three – tenth of a second, multiply them in four seconds.

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