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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 computer card punches and ...
The EMIT control card is a larger, card-shaped stick with a built-in backup feature: a small paper card inside the control card is pierced by a pin in a specific location at each station. In both electronic punch systems, the control code (number) and punch time at each control point are recorded on the card.
A single program deck, with individual subroutines marked. The markings show the effects of editing, as cards are replaced or reordered. Many early programming languages, including FORTRAN, COBOL and the various IBM assembler languages, used only the first 72 columns of a card – a tradition that traces back to the IBM 711 card reader used on the IBM 704/709/7090/7094 series (especially the ...
They come typically in boxes of 2,000 cards [50] or as continuous form cards. Continuous form cards could be both pre-numbered and pre-punched for document control (checks, for example). [51] Initially designed to record responses to yes–no questions, support for numeric, alphabetic and special characters was added through the use of columns ...
OMR is now used as an input device for data entry. Two early forms of OMR are paper tape and punch cards which use actual holes punched into the medium instead of pencil filled circles on the medium. Paper tape was used as early as 1857 as an input device for telegraph. [10] Punch cards were created in 1890 and were used as input devices for ...
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