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- Punched cards were a very popular medium for input/output and data storage in the early period of computer usage. Data was stored in them by the presence, or absence, of holes punched in pre-determined locations.gunkies.org/wiki/Punched_card
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A computer card punch is a computer output device that punches holes in cards. Sometimes computer punch card readers were combined with computer card punches and, later, other devices to form multifunction machines. See more
A computer punched card reader or just computer card reader is a computer input device used to read computer programs in either source or … See more
The standard measure of speed is cards per minute, abbreviated CPM: The number of cards which can be read or punched in one minute. Card reader models vary from 150 to around 2,000 CPM. At 1200 CPM, i.e. 20 cards per second, this translates to 1,600 characters … See more
• Plugboard discusses how early card readers worked in some detail
• Computer programming in the punched card era
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• CDC 405 — CDC 6000 series card reader, 1200 or 1600 cards per minute (CPM)
• CDC … See moreWikipedia text under CC-BY-SA license WEBReflecting punched card input practice, Fortran programs were originally written in a fixed-column format, with the first 72 columns read into twelve 36-bit words. ... Punched cards were used for input and output on the …
WEBMar 10, 2024 · 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 …
The Punch Card - The History of Computing
Why were programs entered on punch cards instead …
WEBApr 11, 2021 · Dale Fisk's Programming With Punched Cards is a fascinating account of programming in the days of punch cards. The fundamental dynamic was that early computers did not yet support …
How it was: Paper tapes and punched cards - EDN
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About: Punched card input/output - DBpedia Association
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Punched card input/output
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