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A punched card (also punch card [1] or punched-card [2]) 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.
Student programmers at the Technische Hochschule in Aachen, West Germany in 1970 using IBM 026 keypunches. Punched card from a Fortran program.. From the invention of computer programming languages up to the mid-1970s, most computer programmers created, edited and stored their programs line by line on punch cards.
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 and instructions. They were a widely used means of inputting data into early computers.
Herman Hollerith designed a machine to tabulate census data more efficiently than by traditional hand methods. It became the computer punch card.
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 cardboard measuring 7⅜ inches by 3¼ inches comprising 80 columns, 12 rows and a series of tiny rectangular holes.
Punch cards, also called "Hollerith cards," or "IBM cards," are stiff paper cards where holes can be punched manually or by a machine to symbolize computer data and commands. These cards were crucial for entering data into early computing systems.
Punch cards surviving in the Smithsonian collections reflect the widespread use of computers - they announced scores on standardized tests, served as a library cards, were part of the proof of mathematical theorems, and kept medical records.