IBM System/360 Model 67: Difference between revisions

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The S/360-67 was intended to satisfy the needs of key [[time-sharing]] customers, notably [[MIT]] (where [[Project MAC]] had become a notorious IBM sales failure), the [[University of Michigan]], [[General Motors]], [[Bell Labs]], [[Princeton University]], the Carnegie Institute of Technology (later [[Carnegie Mellon University]]),<ref>[http://www.multicians.org/thvv/360-67.html ''The IBM 360/67 and CP/CMS''], Tom Van Vleck, 1995, 1997, 2005, 2009</ref> and the [[Naval Postgraduate School]].<ref>[https://upload.wikimedia.org/wikipedia/commons/3/3e/A_simulation_study_of_the_time-sharing_computer_system_at_the_Naval_Postgraduate_School_%28IA_simulationstudyo00good%29.pdf ''A SIMULATION STUDY OF THE TIME-SHARING COMPUTER SYSTEM AT THE NAVAL-POSTGRADUATE SCHOOL''], Ronald Maxwell Goodwin and Leo Michael Pivonka, 1969</ref>

In the mid-1960s a number of organizations were interested in offering interactive computing services using [[time-sharing]].<ref name=Topol30Years>{{cite journal|url=https://www.msu.edu/~mrr/mycomp/mts/others/feat02.htm|title=A History of MTS&mdash;30 Years of Computing Service|author=Susan Topol|journal=Information Technology Digest|volume=5|issue=5|date=May 13, 1996|publisher=University of Michigan|archive-url=https://web.archive.org/web/20130501092032/https://www.msu.edu/~mrr/mycomp/mts/others/feat02.htm|archive-date=May 1, 2013}}</ref> At that time the work that computers could perform was limited by their lack of real memory storage capacity. When IBM introduced its [[System/360]] family of computers in the mid-1960s, it did not provide a solution for this limitation and within IBM there were conflicting views about the importance of time-sharing and the need to support it.

A paper titled ''Program and Addressing Structure in a Time-Sharing Environment'' by [[Bruce Arden]], [[Bernard Galler]], [[Franklin H. Westervelt|Frank Westervelt]] (all associate directors at the University of Michigan's academic Computing Center), and Tom O'Brian building upon some basic ideas developed at the Massachusetts Institute of Technology (MIT) was published in January 1966.<ref name=ArdenVM1966>{{cite journal|url=http://portal.acm.org/citation.cfm?doid=321312.321313|title=Program and Addressing Structure in a Time-Sharing Environment|author1=B. W. Arden|author-link1=Bruce Arden|author2=B. A. Galler|author-link2=Bernard Galler|author3=T. C. O'Brien|author4=F. H. Westervelt|author-link4=Franklin H. Westervelt|journal=[[Journal of the ACM]]|volume=13|issue=1|pages=1–16|date=January 1966|doi=10.1145/321312.321313}}</ref> The paper outlined a [[virtual memory]] architecture using dynamic address translation (DAT) that could be used to implement time-sharing.