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Home > Society and Social Sciences > Society and culture: general > Articles on Unit Record Equipment, Including: Punched Card, Lace Card, IBM 604, IBM 550, IBM 80 Series Card Sorters, IBM 632, IBM 1013, IBM Cpc, Keypunch, IBM 407, IBM 519, IBM 557, Tabulating M
Articles on Unit Record Equipment, Including: Punched Card, Lace Card, IBM 604, IBM 550, IBM 80 Series Card Sorters, IBM 632, IBM 1013, IBM Cpc, Keypunch, IBM 407, IBM 519, IBM 557, Tabulating M

Articles on Unit Record Equipment, Including: Punched Card, Lace Card, IBM 604, IBM 550, IBM 80 Series Card Sorters, IBM 632, IBM 1013, IBM Cpc, Keypunch, IBM 407, IBM 519, IBM 557, Tabulating M


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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. Hephaestus Books represents a new publishing paradigm, allowing disparate content sources to be curated into cohesive, relevant, and informative books. To date, this content has been curated from Wikipedia articles and images under Creative Commons licensing, although as Hephaestus Books continues to increase in scope and dimension, more licensed and public domain content is being added. We believe books such as this represent a new and exciting lexicon in the sharing of human knowledge. This particular book contains chapters focused on Unit record equipment, IBM unit record equipment, IBM keypunches, UNIVAC unit record equipment, and Punch card. More info: Before the advent of electronic computers, data processing was performed using electromechanical devices called unit record equipment, electric accounting machines (EAM) or tabulating machines. Unit record machines were as ubiquitous in industry and government in the first half of the twentieth century as computers became in the second half. They allowed large volume, sophisticated, data-processing tasks to be accomplished long before modern (electronic) computers were invented. This data processing was accomplished by processing decks of punched cards through various unit record machines in a carefully choreographed progression. This progression, or flow, from machine to machine was often planned and documented with drawings that used standardised symbols for the various machine functions - drawings that today would be called flowcharts. The machines all had high-speed mechanical feeders to process from around one hundred cards per minute, to 2,000 cards per minute, sensing punched holes with either electrical or optical sensors. The operation of many machines was directed by the use of a removable control panel. Initially all machines were constructed using electromechanical counters and relays. Electronic components were introduced on some machines beginning in the late 1940s.


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Product Details
  • ISBN-13: 9781244789166
  • Publisher: Hephaestus Books
  • Publisher Imprint: Hephaestus Books
  • Height: 246 mm
  • No of Pages: 98
  • Spine Width: 5 mm
  • Weight: 191 gr
  • ISBN-10: 124478916X
  • Publisher Date: 01 Oct 2011
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Sub Title: Punched Card, Lace Card, IBM 604, IBM 550, IBM 80 Series Card Sorters, IBM 632, IBM 1013, IBM Cpc, Keypunch, IBM 407, IBM 519, IBM 557, Tabulating M
  • Width: 189 mm


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Articles on Unit Record Equipment, Including: Punched Card, Lace Card, IBM 604, IBM 550, IBM 80 Series Card Sorters, IBM 632, IBM 1013, IBM Cpc, Keypunch, IBM 407, IBM 519, IBM 557, Tabulating M
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Articles on Unit Record Equipment, Including: Punched Card, Lace Card, IBM 604, IBM 550, IBM 80 Series Card Sorters, IBM 632, IBM 1013, IBM Cpc, Keypunch, IBM 407, IBM 519, IBM 557, Tabulating M
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Articles on Unit Record Equipment, Including: Punched Card, Lace Card, IBM 604, IBM 550, IBM 80 Series Card Sorters, IBM 632, IBM 1013, IBM Cpc, Keypunch, IBM 407, IBM 519, IBM 557, Tabulating M

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