Computer Collection Library

Punched Card Machines

Punched card machines were used to do all sorts of business data processing tasks. They are based on the principle of making individual records of information on paper cards using punched holes so the machines could read them and printing so people could read them. The first machines were invented by Hermann Hollerith for use in the US 1890 census. His company became one of the cornerstones of IBM. Punched card data processing machines are generally electro-mechanical where card reading, data routing and control is done electrically and card punching, printing, counting and timing is mechanical.


Last updated 05 Apr 2005

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