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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. ... "Do not fold, spindle or mutilate ...
Spindling was the middle of three stern prohibitions in the famous injunction historically printed on punched card documents to be processed by a computer: "Do not fold, spindle, or mutilate". [ 2 ] References
Because punched card readers scan uniform rectangular holes in a precise arrangement, any damage to the physical card makes it unusable. In the 1950s and 1960s, when the use of punch cards became widespread, manufacturers printed a warning on each card reading "Do not fold, spindle or mutilate".
Punched Card Primer. American Book - Stratford Press. This elementary introduction to punched card systems is unusual because unlike most others, it not only deals with the IBM systems but also illustrates the card formats and equipment offered by Remington Rand and Underwood Samas. Erwin Tomash Library; IBM (1936) Machine Methods of Accounting ...
Do Not Fold, Spindle or Mutilate [1] [2] is a 1971 American made-for-television mystery film directed by Ted Post, starring Myrna Loy, Helen Hayes, Mildred Natwick, Sylvia Sidney, John Beradino and Vince Edwards, [3] with the screenplay adapted by John D. F. Black from a novel of the same name by Doris Miles Disney. [4]
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.
Edge-notched card used as a library card. Edges not notched here. McBee Keysort card (1932 – 1980s): front and rear, with instructional diagram on rear. Cards existed in many variants, with differing sizes and numbers of rows of holes. The center of the card could be blank for information to be written onto, or contain a pre-printed form.
In its basic form, a tabulating machine would read one card at a time, print portions (fields) of the card on fan-fold paper, possibly rearranged, and add one or more numbers punched on the card to one or more counters, called accumulators. On early models, the accumulator register dials would be read manually after a card run to get totals.