It was one of the earliest icons of the Information Age: a simple punched card produced by IBM, commonly known as “the IBM card.” The card itself was unassuming, a thin piece of stiff …

One of the most common punched card formats is the IBM 5081 card format, a general purpose layout with no field divisions. This format has digits printed on it corresponding to the punch …

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The US military used IBM's punch card for cryptography and weapons development, including calculations for the Manhattan project. The punch card was a critical technology in the early …

Jun 25, 2025 · Punch cards (or " punched cards "), also known as Hollerith cards or IBM cards, are paper cards where holes may be punched by hand or machine to represent computer data …

Until the mid-1970s, most computer access was via punched cards. Programs and data were punched by hand on a key punch machine such as the IBM 026 and fed into a card reader like …

This is a machine for punching such cards manufactured by International Business Machines Corporation of New York. The tabletop key-driven machine punches twelve rectangular holes …

Computer programming in the punched card era Student programmers at the Technische Hochschule in Aachen, West Germany in 1970 using IBM 026 keypunches. Punched card …

The success of the tabulator in calculating census returns was quickly followed by a widening recognition of how punched cards, tabulators and sorting machines could be applied …

Hollerith’s punched card tabulator, developed in the 1880s, eased the administrative burden of hand-counting the population in a country whose numbers were exploding.