In 1936, there were no Electronic Digital Computers in the World. By the year 2000, it was estimated over 500 million were in use worldwide.

1880 Herman Hollerith an American inventor, uses his tabulating machine to process the 1880 census data. Hollerith later forms a company to manufacture and sell the machine. Hollerith' company grew and merged with other companies to eventually become IBM. Hollerith used punched cards in his tabulating machine These later became refined and came to be known as "IBM cards", or simply "punch cards."

 

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