1854 George Boole, an English mathematician, develops a revolutionary type of Algebra based on the numbers one and zero. This system is now referred to as Boolean Algebra. This was later found to be a very useful way of representing information in computers.

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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