Standard Modular System: Difference between revisions

Revision as of 03:36, 19 December 2010

Revision as of 23:08, 15 June 2011

Line 2:

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

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

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 and, peripherals, including its first transistorized calculator, the [[IBM 608]],<ref>http://www.columbia.edu/acis/history/608.html</ref> and the [[IBM 700/7000 series|7000]], andthe [[IBM 1400 series|1400]] lines, 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 SMS was superseded by [[Solid Logic Technology]] (SLT) introduced with [[System/360]] in 1964, however they remained in use with legacy systems through the 1970s.

Many IBM peripheral devices that were part of System/360, but were adapted from second-generation designs, continued to use SMS circuitry instead of the newer SLT. These included the 240x-series tape drives and controllers, the 2540 card reader/punch and 1403N1 printer, and the 2821 Integrated Control Unit for the 1403 and 2540. A few SMS cards used in System/360 peripheral devices even had SLT-type hybrid IC's mounted on them.