Z/VM. z/VM is the current version in IBM's VM family of virtual machine operating systems. First released in October 2000, z/VM remains in active use and development . It is directly based on technology and concepts dating back to the 1960s, particularly IBM's CP/CMS on the IBM System/360-67 (see article History of CP/CMS for historical details). z/VM runs on IBM's IBM Z family of computers and can support large numbers (thousands) of Linux virtual machines. (See Linux on IBM Z.)

On 16 September 2022, IBM released z/VM Version 7.3 which requires z/Architecture, implemented in IBM's EC12, BC12 and later models.

See also
 OpenSolaris for System z
 PR/SM
 Time-sharing system evolution
 z/OS
 z/TPF
 z/VSE

References

Citations

 Primary CP/CMS sources

 R. J. Creasy, "The origin of the VM/370 time-sharing system", IBM Journal of Research & Development, Vol. 25, No. 5 (September 1981), pp. 483–90, PDF― perspective on CP/CMS and VM history by the CP-40 project lead, also a CTSS author
 E.W. Pugh, L.R. Johnson, and John H. Palmer, IBM's 360 and early 370 systems, MIT Press, Cambridge MA and London, ― extensive (819 pp.) treatment of IBM's offerings during this period; the limited coverage of CP/CMS in such a definitive work is telling
 Melinda Varian,  VM and the VM community, past present, and future, SHARE 89 Sessions 9059–61, 1997;― an outstanding source for CP/CMS and VM history
 Bitsavers, Index of /pdf/ibm/360/cp67

 Additional CP/CMS sources

 R. J. Adair, R. U. Bayles, L. W. Comeau and R. J. Creasy, A Virtual Machine System for the 360/40, IBM Corporation, Cambridge Scientific Center Report No. 320‐2007 (May 1966)― a seminal paper describing implementation of the virtual machine concept, with descriptions of the customized CSC S/360-40 and the CP-40 design
 International Business Machines Corporation, CP-67/CMS, Program 360D-05.2.005, IBM Program Information Department (June 1969)― IBM's reference manual
 R. A. Meyer and L. H. Seawright, "A virtual machine time-sharing system," IBM Systems Journal, Vol. 9, No. 3, pp. 199–218 (September 1970)― describes the CP-67/CMS system, outlining features and applications
 R. P. Parmelee, T. I. Peterson, C. C. Tillman, and D. J. Hatfield, "Virtual storage and virtual machine concepts," IBM Systems Journal, Vol. 11, No. 2 (June 1972)

 Background CP/CMS sources

 F. J. Corbató, et al., The Compatible Time-Sharing System, A Programmer’s Guide, M.I.T. Press, 1963
 F. J. Corbató, M. Merwin-Daggett, and R. C. Daley, "An Experimental Time-sharing System," Proc. Spring Joint Computer Conference (AFIPS) 21, pp. 335–44 (1962) — description of CTSS
 F. J. Corbató and V. A. Vyssotsky, "Introduction and Overview of the MULTICS System", Proc. Fall Joint Computer Conference (AFIPS) 27, pp. 185–96 (1965)
 P. J. Denning, "Virtual Memory", Computing Surveys Vol. 2, pp.  153–89 (1970)
 J. B. Dennis, "Segmentation and the Design of Multi-Programmed Computer Systems," JACM Vol. 12, pp. 589–602 (1965)― virtual memory requirements for Project MAC, destined for GE 645
 C. A. R. Hoare and R. H. Perrott, Eds., Operating Systems Techniques, Academic Press, Inc., New York (1972)
 T. Kilburn, D. B. G. Edwards, M. J. Lanigan, and F. H. Sumner, "One-Level Storage System", IRE Trans. Electron. Computers EC-11, pp. 223–35 (1962)― Manchester/Ferranti Atlas
 R. A. Nelson, "Mapping Devices and the M44 Data Processing System," Research Report RC 1303, IBM Thomas J. Watson Research Center (1964)― about the IBM M44/44X
 R. P. Parmelee, T. I. Peterson, C. C. Tillman, and D. J. Hatfield, "Virtual Storage and Virtual Machine Concepts", IBM Systems Journal, Vol. 11, pp. 99–130 (1972)

 Additional on-line CP/CMS resources

 febcm.club.fr —  Information Technology Timeline, 1964–74
 www.multicians.org — Tom Van Vleck's short essay  The IBM 360/67 and CP/CMS
  www.cap-lore.com — Norman Hardy's  Short history of IBM's virtual machines
  www.cap-lore.com — Norman Hardy's  short description of the "Blaauw Box"

External links
 
 IBM z/VM Evaluation Edition (free download)

Virtualization software
IBM mainframe operating systems