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History
Punched card
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A punched card is a piece of card stock that stores digital data using punched holes. Punched cards were once common in data processing and the control of automated machines.
A 12-row/80-column IBM punched card from the mid-twentieth century
A 12-row/80-column IBM punched card from the mid-twentieth century
Close-up of a Jacquard loom's chain, constructed using 8 × 26 hole punched cards
Close-up of a Jacquard loom's chain, constructed using 8 × 26 hole punched cards
Carpet loom with Jacquard apparatus by Carl Engel, around 1860. Chain feed is on the left.
Carpet loom with Jacquard apparatus by Carl Engel, around 1860. Chain feed is on the left.
Woman operating the card puncher, c.1940
Woman operating the card puncher, c.1940
Data processing
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Data processing is the collection and manipulation of digital data to produce meaningful information. Data processing is a form of information processing, which is the modification (processing) of information in any manner detectable by an observer.
Image: Stockbridge system flowchart example
Image: Stockbridge system flowchart example