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A punched card is a flexible write-once medium that encodes data, most commonly 80 characters. Groups or "decks" of cards form programs and collections of data. The term is often used interchangeably with punch card, the difference being that an unused card is a "punch card," but once information had been encoded by punching holes in the card ...
A deck of punched cards comprising a computer program. The red diagonal line is a visual aid to keep the deck sorted. [32] The terms punched card, punch card, and punchcard were all commonly used, as were IBM card and Hollerith card (after Herman Hollerith). [1]
Punched card input/output. A computer punched card reader or just computer card reader is a computer input device used to read computer programs in either source or executable form and data from punched cards. A computer card punch is a computer output device that punches holes in cards. Sometimes computer punch card readers were combined with ...
Pilot ACE Punch cards, detail view against dark grey background, for Pilot ACE computer, built at the National Physical Laboratory (United Kingdom), circa 1950. Science Museum London [1] The Automatic Computing Engine (ACE) was a British early electronic serial stored-program computer design by Alan Turing.
Computer programming or coding is the composition of sequences of instructions, called programs, ... Programs were mostly entered using punched cards or paper tape.
Glossary of computer science. Category. v. t. e. The analytical engine was a proposed digital mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage. [2][3] It was first described in 1837 as the successor to Babbage's difference engine, which was a design for a simpler mechanical calculator.
The Jacquard head used replaceable punched cards to control a sequence of operations. It is considered an important step in the history of computing hardware. [24] The ability to change the pattern of the loom's weave by simply changing cards was an important conceptual precursor to the development of computer programming and data entry.
FORTRAN code on a punched card, showing the specialized uses of columns 1–5, 6 and 73–80 A reproduction of a FORTRAN coding form, printed on paper and intended to be used by programmers to prepare programs for punching onto cards by keypunch operators. Now obsolete.