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- IBM_407 abstract "The IBM 407 Accounting Machine, introduced in 1949, was one of a long line of IBM tabulating machines dating back to the days of Herman Hollerith. It was the central component of many unit record equipment shops. In the 1950s, the 407 was adapted as an input/output device on early computers, such as the IBM 650. Later, 407 print mechanisms were used in the IBM 1132 line printer, part of the low cost IBM 1130 computer system.The 407 read punched cards, totaled fields on the cards, made simple decisions, printed results, and, with the aid of a summary punch, output results on punched cards that could be input to other processing steps.The operation of the 407 was directed by the use of a removable control panel and a carriage tape. Exit hubs (impulse emitting) on the control panel are wired to entry hubs (impulse accepting) for the task to be done (see Wiring of unit record equipment). There are hubs for each card column (at both reading stations), print position, counter digit, and so on. Logic tests were also available.Each input card was read at two successive reading stations. Thus, for example, fields in a card could be compared with the following card and, should a change be detected, say in invoice number, totals could be printed. Unlike earlier IBM tabulating machines, which had 80 read brushes at each read station, one for each column, the 407 had 960 brushes at each station, one for each possible hole in a punched card. Cards were held in position during each read cycle and the per digit pulses needed were generated using commutators, one for each column. This allowed the card to be read more than once at each station, for greater programming flexibility.For printing, the 407 used wheels, an improvement over earlier tabulators that used print bars. The wheels were stationary until a character impulse was to be printed; the wheel then rotated to one of 47 positions for printing, was driven against the plate, and then emitted an impulse (called "echo") for the character actually printed. The control panel would be wired so the echo impulses were accumulated for totals; report totals then reliably reflected what had actually been printed.The 407 was available in a model that could read 100 cards per minute, and one reading 150 cards per minute. The former had a relay which would inhibit every third card feed cycle (giving the machine a characteristic "shrink-shrink-thunk" sound). It was possible to insert a folded card between that relay's contacts to "overclock" the slower model to the faster speed.The IBM World Trade Corporation marketed Computing Accounting Machines (CAM), variations of either the 402 or 407 with an attached computer. CAM variations of the 407 included the 421, 444, and 447.In 1976 the IBM 407 Accounting Machine was withdrawn from marketing.".
- IBM_407 thumbnail Ibm407_tabulator_1961_01.redstone.jpg?width=300.
- IBM_407 wikiPageExternalLink 22-5765-7_407_Operation_1953.pdf.
- IBM_407 wikiPageExternalLink vintage_4506VV4007.html.
- IBM_407 wikiPageExternalLink wit_definitions.html.
- IBM_407 wikiPageExternalLink 407.html.
- IBM_407 wikiPageExternalLink HzG-407-Sound.wmv.
- IBM_407 wikiPageID "858691".
- IBM_407 wikiPageLength "4903".
- IBM_407 wikiPageOutDegree "17".
- IBM_407 wikiPageRevisionID "605630882".
- IBM_407 wikiPageWikiLink Category:1949_introductions.
- IBM_407 wikiPageWikiLink Category:IBM_unit_record_equipment.
- IBM_407 wikiPageWikiLink Commutator_(electric).
- IBM_407 wikiPageWikiLink Herman_Hollerith.
- IBM_407 wikiPageWikiLink IBM.
- IBM_407 wikiPageWikiLink IBM_1130.
- IBM_407 wikiPageWikiLink IBM_1132.
- IBM_407 wikiPageWikiLink IBM_402.
- IBM_407 wikiPageWikiLink IBM_650.
- IBM_407 wikiPageWikiLink Line_printer.
- IBM_407 wikiPageWikiLink List_of_IBM_products.
- IBM_407 wikiPageWikiLink Plugboard.
- IBM_407 wikiPageWikiLink Punched_card.
- IBM_407 wikiPageWikiLink Tabulating_machine.
- IBM_407 wikiPageWikiLink Unit_record_equipment.
- IBM_407 wikiPageWikiLink File:Ibm407_tabulator_1961_01.redstone.jpg.
- IBM_407 wikiPageWikiLinkText "IBM 407".
- IBM_407 wikiPageWikiLinkText "IBM 408".
- IBM_407 wikiPageWikiLinkText "IBM 409".
- IBM_407 wikiPageWikiLinkText "IBM 421".
- IBM_407 wikiPageWikiLinkText "IBM 444".
- IBM_407 wikiPageWikiLinkText "IBM 447".
- IBM_407 wikiPageWikiLinkText "model 407".
- IBM_407 hasPhotoCollection IBM_407.
- IBM_407 wikiPageUsesTemplate Template:Cite_book.
- IBM_407 wikiPageUsesTemplate Template:Portal.
- IBM_407 subject Category:1949_introductions.
- IBM_407 subject Category:IBM_unit_record_equipment.
- IBM_407 hypernym Line.
- IBM_407 type Product.
- IBM_407 comment "The IBM 407 Accounting Machine, introduced in 1949, was one of a long line of IBM tabulating machines dating back to the days of Herman Hollerith. It was the central component of many unit record equipment shops. In the 1950s, the 407 was adapted as an input/output device on early computers, such as the IBM 650.".
- IBM_407 label "IBM 407".
- IBM_407 sameAs IBM_407.
- IBM_407 sameAs m.03hy48.
- IBM_407 sameAs Q1653069.
- IBM_407 sameAs Q1653069.
- IBM_407 wasDerivedFrom IBM_407?oldid=605630882.
- IBM_407 depiction Ibm407_tabulator_1961_01.redstone.jpg.
- IBM_407 isPrimaryTopicOf IBM_407.