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Punched Cards

Pedro Trebbau Lopez - A punched card

Pedro Trebbau Lopez – A punched card

Pedro Trebbau Lopez

The punched cards is made ​​of cardboard sheet containing information in the form of perforations in a binary code. These were the first methods used to enter data and instructions into a computer in the 1960s and 1970s. Punch cards were used previously by Joseph Marie Jacquard  in his invention, the automated loom. They were then used in  the first electronic computers by companies such as IBM, NCR, Burroughs and others.

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