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An IBM tabulating machine, such as the 402 or 407 series would have several counters available in different sizes. (For example, the IBM 402/403 had four sets each of 2, 4, 6 and 8 digit counters, labeled 2A, 2B, 2C, 2D, 4A, 4B etc.) Each counter had two counter control entries to specify either addition (plus) or subtraction (minus). If ...
IBM 407 (left) with IBM 519 (on right). 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 ...
1976: The IBM 407 Accounting Machine was withdrawn from marketing. [66] 1978: IBM's Rochester plant made its last shipment of the IBM 082, 084, 085, 087, 514, and 548 machines. [67] The System/3 was succeeded by the System/38. [64] 1980: The last reconditioning of an IBM 519 Document Originating Punch. [68]
IBM 402 and 403, from 1948, were modernized successors to the 405. Control panel for an IBM 402 Accounting Machine. The 1952 Bull Gamma 3 could be attached to this tabulator or to a card read/punch. [20] [21] IBM 407. Introduced in 1949, the 407 was the mainstay of the IBM unit record product line for almost three decades.
2 Multiplication on the 407. 4 comments. 3 Was it still plugboard programmable when used with the IBM 650. 1 comment. 4 Overclocking. 2 comments.
The original example of PCM mainframes was the Amdahl 470 mainframe computer which was plug-compatible with the IBM System 360 and 370, costing millions of dollars to develop. Similar systems were available from Comparex , Fujitsu , [ 11 ] and Hitachi .
The National Review, Mar 22, 2016 Share on Facebook Share on Twitter Trump’s primary work long ago became less about building anything than about branding himself and tending to his celebrity through a variety of entertainment ventures, from WWE to his reality-TV show, The Apprentice.
Plug board may refer to: Plugboard, a component of certain encryption machines, unit record equipment and some early computers; Telephone switchboard, another name for a manual exchange; Power strip a device that plugs into a power socket to increase the number of power sockets available for other devices