Standard Modular System: Difference between revisions

Revision as of 04:52, 30 August 2011

Revision as of 03:53, 9 February 2012

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{{Other uses|IBM SMS (disambiguation){{!}}IBM SMS}}

[[File:SMScard.jpg|thumb|A single width SMS card.]]

[[File:IBM 1401 card cage.agr.jpg|thumb|SMS card in an [[IBM 1401]] mid-size computer.]]

[[File:SMS card from IBM 1401.agr.JPG|thumb|SMS card from a 1401]]

[[File:SMS card with power transistors.agr.jpg|thumb|Another 1401 SMS card, this one with power transistors. It was used to drive print hammers on an [[IBM 1403]] line printer.]]

The '''Standard Modular System (SMS)''' was a system of standard [[transistor]]ized circuit boards and mounting racks developed by [[IBM]] in the late 1950s, originally for the [[IBM 7030 Stretch]].{{Citation needed|date=May 2010}} They were used throughout IBM's second generation computers, peripherals, the [[IBM 700/7000 series|7000 series]], the [[IBM 1400 series|1400 series]], and the [[IBM 1620|1620]]. SMS was superseded by [[Solid Logic Technology]] (SLT) introduced with [[System/360]] in 1964, however they remained in use with legacy systems through the 1970s.