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Home > Art, Film & Photography > IBM Unit Record Equipment: Punched Card, Lace Card, IBM 604, IBM 550, Unit Record Equipment, Keypunch, Tabulating Machine
IBM Unit Record Equipment: Punched Card, Lace Card, IBM 604, IBM 550, Unit Record Equipment, Keypunch, Tabulating Machine

IBM Unit Record Equipment: Punched Card, Lace Card, IBM 604, IBM 550, Unit Record Equipment, Keypunch, Tabulating Machine


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About the Book

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 23. Chapters: Punched card, Lace card, IBM 604, IBM 550, Unit record equipment, Keypunch, Tabulating machine, IBM 80 series Card Sorters, IBM 557, Plugboard, IBM 632, IBM CPC, Mark sense, IBM 407, IBM 603, IBM 602, IBM 101, IBM 519, IBM Electromatic Table Printing Machine, IBM 513, IBM 514, IBM 6400 Series, IBM 1013. Excerpt: A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions. Now an obsolete recording medium, punched cards were widely used throughout the 19th century for controlling textile looms and in the late 19th and early 20th century for operating fairground organs and related instruments. They were used through the 20th century in unit record machines for input, processing, and data storage. Early digital computers used punched cards, often prepared using keypunch machines, as the primary medium for input of both computer programs and data. Some voting machines use punched cards. An 80-column punched card of the type most widely used in the 20th century. Card size was in x in (187.325 mm x 82.55 mm). This example displays the 1964 EBCDIC character set, which added more special characters to earlier encodings. Punched cards in use in a Jacquard loom. Punched cards of a large dance organPunched cards were first used around 1725 by Basile Bouchon and Jean-Baptiste Falcon as a more robust form of the perforated paper rolls then in use for controlling textile looms in France. This technique was greatly improved by Joseph Marie Jacquard in his Jacquard loom in 1801. Semen Korsakov was reputedly the first to use the punched cards in informatics for information store and search. Korsakov announced his new method and machines in September 1832, and rather than seeking patents offered the machines...


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Product Details
  • ISBN-13: 9781234570538
  • Publisher: Books LLC, Wiki Series
  • Publisher Imprint: Books LLC, Wiki Series
  • Height: 246 mm
  • No of Pages: 24
  • Spine Width: 1 mm
  • Weight: 64 gr
  • ISBN-10: 123457053X
  • Publisher Date: 07 Oct 2011
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Punched Card, Lace Card, IBM 604, IBM 550, Unit Record Equipment, Keypunch, Tabulating Machine
  • Width: 189 mm


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