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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 .
IBM 080 Card Sorter IBM 082 Card Sorter. A punched card sorter is a machine for sorting decks of punched cards. Sorting was a major activity in most facilities that processed data on punched cards using unit record equipment. The work flow of many processes required decks of cards to be put into some specific order as determined by the data ...
The notches allow efficient sorting of a large number of cards in a paper-based database, as well as the selection of specific cards matching multiple desired criteria. Unlike machine-readable punched cards , edge-notched cards were designed to be manually sorted by human operators.
The 101 could sort cards based on multiple columns. For example, if a card had multiple 3-column test scores, the 101 could be wired to sort into pocket 0 those cards with no scores over 090, into pocket 1 those with one score over 090, and so on; logic limited only by the number of relays available.
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.
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If the card was to be sorted, a compartment lid of the sorting box would open for storage of the card, the choice of compartment depending on the data in the card. [8] Hollerith's method was used for the 1890 census. Clerks used keypunches to punch holes in the cards entering age, state of residence, gender, and other information from the ...
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