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- 44X abstract "The IBM M44/44X was an experimental computer system from the mid-1960s, designed and operated at IBM's Thomas J. Watson Research Center at Yorktown Heights, New York. It was based on an IBM 7044 (the 'M44'), and simulated multiple 7044 virtual machines (the '44X'), using both hardware and software. Key team members were Dave Sayre and Rob Nelson. This was a groundbreaking machine, used to explore paging, the virtual machine concept, and computer performance measurement. It was purely a research system, and was cited in 1981 by Peter Denning as an outstanding example of experimental computer science.The term virtual machine probably originated with the M44/44X project, from which it was later appropriated by the CP-40 team to replace their earlier term pseudo machine.Unlike CP-40 and later CP/CMS control programs, M44/44X did not implement a complete simulation of the underlying hardware (i.e. full virtualization). CP-40 project leader Robert Creasy observed:The M44/44X "was about as much of a virtual machine system as CTSS – which is to say that it was close enough to a virtual machine system to show that 'close enough' did not count. I never heard a more eloquent argument for virtual machines than from Dave Sayre."M44/44X "implanted the idea that the virtual machine concept is not necessarily less efficient than more conventional approaches" – a core assumption in the CP/CMS architecture, and one that ultimately proved very successful.".
- 44X wikiPageExternalLink 25paper.pdf.
- 44X wikiPageExternalLink ecs.pdf.
- 44X wikiPageExternalLink ibmrd2505M.pdf.
- 44X wikiPageID "8209627".
- 44X wikiPageLength "4262".
- 44X wikiPageOutDegree "23".
- 44X wikiPageRevisionID "650048752".
- 44X wikiPageWikiLink CMS.
- 44X wikiPageWikiLink Category:IBM_transistorized_computers.
- 44X wikiPageWikiLink Category:Virtualization_software.
- 44X wikiPageWikiLink Communications_of_the_ACM.
- 44X wikiPageWikiLink Compatible_Time-Sharing_System.
- 44X wikiPageWikiLink Computer_performance_measurement.
- 44X wikiPageWikiLink Full_virtualization.
- 44X wikiPageWikiLink IBM_7040.
- 44X wikiPageWikiLink IBM_7044.
- 44X wikiPageWikiLink IBM_CP-40.
- 44X wikiPageWikiLink Laszlo_Belady.
- 44X wikiPageWikiLink László_Bélády.
- 44X wikiPageWikiLink Paging.
- 44X wikiPageWikiLink Peter_J._Denning.
- 44X wikiPageWikiLink Robert_Creasy.
- 44X wikiPageWikiLink Software_performance_testing.
- 44X wikiPageWikiLink Thomas_J._Watson_Research_Center.
- 44X wikiPageWikiLink VM_(operating_system).
- 44X wikiPageWikiLink Virtual_machine.
- 44X wikiPageWikiLinkText "IBM M44/44X".
- 44X wikiPageWikiLinkText "M44/44X".
- 44X hasPhotoCollection 44X.
- 44X wikiPageUsesTemplate Template:Reflist.
- 44X subject Category:IBM_transistorized_computers.
- 44X subject Category:Virtualization_software.
- 44X hypernym System.
- 44X type Computer.
- 44X type Layer.
- 44X comment "The IBM M44/44X was an experimental computer system from the mid-1960s, designed and operated at IBM's Thomas J. Watson Research Center at Yorktown Heights, New York. It was based on an IBM 7044 (the 'M44'), and simulated multiple 7044 virtual machines (the '44X'), using both hardware and software. Key team members were Dave Sayre and Rob Nelson. This was a groundbreaking machine, used to explore paging, the virtual machine concept, and computer performance measurement.".
- 44X label "IBM M44/44X".
- 44X sameAs m.026w8v3.
- 44X sameAs Q5968883.
- 44X sameAs Q5968883.
- 44X wasDerivedFrom 44X?oldid=650048752.
- 44X isPrimaryTopicOf 44X.