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There are 80 contacts, one for each column on a standard IBM punched card. Input hopper for the IBM 1402's card punch Cables entering the back of the IBM 1402. The IBM 1402 was a high-speed card reader/punch introduced on October 5, 1959 as a peripheral input/output device for the IBM 1401 computer.
Mark sense card. The IBM 2956 Models 2 and 3 are custom build optical mark/hole readers designed to be attached to an IBM 2740 Communications Terminal. [11] The IBM 2956-2 can read cards that have either been hand or machine marked or that have been punched. The cards can be fed by hand or from the 400 card hopper. It has a 400 card stacker. [11]
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 ...
An IBM 80-column punched card of the type most widely used in the 20th century IBM 1442 card reader/punch for 80 column cards. 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 card reader is a data input device that reads data from a card-shaped storage medium and provides the data to a computer. Card readers can acquire data from a card via a number of methods, including: optical scanning of printed text or barcodes or holes on punched cards, electrical signals from connections made or interrupted by a card's punched holes or embedded circuitry, or electronic ...
The 1442 Model 2 reads cards at 400 cpm and punches from 91 to 360 cpm. Two stackers are standard. The 1442 Model 6 attaches to an IBM System/3 or IBM 1130, reads 300 cpm [11] and punches 80 columns per second. [12] The 1442 Model 7 attaches to an IBM System/3 or IBM 1130, reads 400 cpm and punches 180 columns per second.
The number of different memory cards that a multi card reader can accept is expressed as x-in-1, with x being a figure of merit indicating the number of memory cards accepted, such as 35-in-1. There are three categories of card readers sorted by the type and quantity of the card slots: single card reader (e.g. 1x SD-only), multi card reader (e ...
IBM 2540 card read/punch in an IBM System/370 Model 145 installation. The 2540 attaches to a System/360 multiplexer or selector channel through an IBM 2821 Control Unit. A standard 2540 processes standard IBM 80 column punched cards. The card reader (2540R) and card punch (2540P) devices are separately addressable and function independently.