Punched Card

A punched card is a stiff paper-based medium used to store digital information via the presence or absence of holes in predefined positions. Developed over the 19th to 20th centuries, punched cards were widely used for data processing, the control of automated machines, and computing. Early applications included controlling weaving looms and recording census data.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 4.0

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