punched card
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AI overview
A punched card is a piece of stiff paper with holes punched in specific patterns to record and store information, which machines could read and process. These cards were widely used in the early computing era to input data and instructions into computers before modern keyboards and digital storage became available.
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Research
1,350 papers- Punched Card Preparation.Bulletin of the Medical Library Association · 1961
- [Prebioptic punched-card].Ceskoslovenska gynekologie · 1972
- [Contraceptive punched card].Ceskoslovenska gynekologie · 1967
- Anaesthetic record card.Anaesthesia · 1963
- A PUNCHED-CARD REFERENCE SYSTEM FOR BIOCHEMISTS.Clinical chemistry · 1964
via PubMed
Article
A set of two 12-row/80-column punched cards (one blank, one used) from the mid-twentieth century
A punched card (also punch 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.