IBM System/360 Model 67: Difference between revisions

Revision as of 22:41, 3 April 2022

Revision as of 23:48, 3 April 2022

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| url = http://www.bitsavers.org/pdf/ibm/370/fe/3145/SY24-3581-1_3145_Processing_Unit_Theory-Maintenance_Oct71.pdf

| title = IBM Maintenance Library 3145 Processing Unit Theory - Maintenance

| edition = Second

| id = SY24-3581-1

| publisher = IBM

}}{{rp| pages = 2{{hyp}}117–2{{hyp}}129
}}</ref> This was largely fallout from a bitter and highly visible political battle within IBM over the merits of [[time-sharing]] versus [[batch processing]]. Initially at least, time-sharing lost.

However, IBM faced increasing customer demand for time-sharing and virtual memory capabilities. IBM also could not ignore the large number of S/360-67 time-sharing installations &ndash; including the new industry of [[time-sharing]] vendors, such as [[National CSS]]<ref>[http://www.computerhistory.org/corphist/documents/doc-42ae226a5a4a1.pdf "A technical history of National CSS"], Harold Feinleib, Computer History Museum (March 2005)</ref><ref>[http://www.computerhistory.org/corphist/documents/doc-422fd82791f26.pdf "From the very beginning... from my vantage point — early history of National CSS"], Dick Orenstein, Computer History Museum (January 2005)</ref> and [[Interactive Data Corporation]] (IDC),<ref>Varian, op. cit., pp. 24, Note 76 – IDC systems (quoting Dick Bayles)</ref> that were quickly achieving commercial success.

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| url = http://www.bitsavers.org/pdf/ibm/370/fe/3145/SY24-3581-4_3145_Processor_Theory_Maintenance.pdf

| title = IBM Maintenance Library 3145 Processing Unit Theory - Maintenance

| edition = Fifth

| id = SY24-3581-4

| publisher = IBM

| page = CPU 139

}}{{rp|CPU 139}}</ref> The survival and success of IBM's [[VM (operating system)|VM]] family, and of virtualization technology in general, also owe much to the S/360-67.

In 2010, in the technical description of its latest mainframe, the [[IBM zEnterprise System|z196]], IBM stated that its software virtualization started with the System/360 model 67.<ref>[{{cite web|url=http://publibfp.dhe.ibm.com/epubs/pdf/sg247832.pdf |id=SG24-7832-00: |title=IBM zEnterprise System Technical Introduction], |page =57: "|quote=Starting in 1967, IBM has continuously provided software virtualization in its mainframe servers.}}</ref>

its mainframe servers."</ref>

== References ==