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3 definitions found
 for Multics
From V.E.R.A. -- Virtual Entity of Relevant Acronyms (September 2014) :

  MULTICS
         MULTiplexed Information and Computing Service (OS, MIT, Bell)
         

From The Jargon File (version 4.4.7, 29 Dec 2003) :

  Multics
   /muhl'tiks/, n.
  
      [from ?MULTiplexed Information and Computing Service?] An early timesharing
      operating system co-designed by a consortium including MIT, GE, and Bell
      Laboratories as a successor to CTSS. The design was first presented in
      1965, planned for operation in 1967, first operational in 1969, and took
      several more years to achieve respectable performance and stability.
  
      Multics was very innovative for its time ? among other things, it provided
      a hierarchical file system with access control on individual files and
      introduced the idea of treating all devices uniformly as special files. It
      was also the first OS to run on a symmetric multiprocessor, and the only
      general-purpose system to be awarded a B2 security rating by the NSA (see {
      Orange Book).
  
      Bell Labs left the development effort in 1969 after judging that {
      second-system effect had bloated Multics to the point of practical
      unusability. Honeywell commercialized Multics in 1972 after buying out GE's
      computer group, but it was never very successful: at its peak in the 1980s,
      there were between 75 and 100 Multics sites, each a multi-million dollar
      mainframe.
  
      One of the former Multics developers from Bell Labs was Ken Thompson, and {
      Unix deliberately carried through and extended many of Multics' design
      ideas; indeed, Thompson described the very name ?Unix? as ?a weak pun on
      Multics?. For this and other reasons, aspects of the Multics design remain
      a topic of occasional debate among hackers. See also brain-damaged and {
      GCOS.
  
      MIT ended its development association with Multics in 1977. Honeywell sold
      its computer business to Bull in the mid 80s, and development on Multics
      was stopped in 1988. Four Multics sites were known to be still in use as
      late as 1998, but the last one (a Canadian military site) was
      decommissioned in November 2000. There is a Multics page at http://
      www.stratus.com/pub/vos/multics/tvv/multics.html.
  

From The Free On-line Dictionary of Computing (18 March 2015) :

  Multics
  
      /muhl'tiks/ MULTiplexed Information and
     Computing Service.  A time-sharing operating system
     co-designed by a consortium including MIT, GE and Bell
     Laboratories as a successor to MIT's CTSS.  The system
     design was presented in a special session of the 1965 Fall
     Joint Computer Conference and was planned to be operational in
     two years.  It was finally made available in 1969, and took
     several more years to achieve respectable performance and
     stability.
  
     Multics was very innovative for its time - among other things,
     it was the first major OS to run on a symmetric
     multiprocessor; provided a hierarchical file system with
     access control on individual files; mapped files into a
     paged, segmented virtual memory; was written in a
     high-level+language+({PL/I">high-level language ({PL/I); and provided dynamic
     inter-procedure linkage and memory (file) sharing as the
     default mode of operation.  Multics was the only
     general-purpose system to be awarded a B2 security rating by
     the NSA.
  
     Bell Labs left the development effort in 1969.  Honeywell
     commercialised Multics in 1972 after buying out GE's computer
     group, but it was never very successful: at its peak in the
     1980s, there were between 75 and 100 Multics sites, each a
     multi-million dollar mainframe.
  
     One of the former Multics developers from Bell Labs was Ken
     Thompson, a circumstance which led directly to the birth of
     Unix.  For this and other reasons, aspects of the Multics
     design remain a topic of occasional debate among hackers.  See
     also brain-damaged and GCOS.
  
     MIT ended its development association with Multics in 1977.
     Honeywell sold its computer business to Bull in the mid
     1980s, and development on Multics was stopped in 1988 when
     Bull scrapped a Boston proposal to port Multics to a
     platform derived from the DPS-6.
  
     A few Multics sites are still in use as late as 1996.
  
     The last Multics system running, the Canadian Department of
     National Defence Multics site in Halifax, Nova Scotia, Canada,
     shut down on 2000-10-30 at 17:08 UTC.
  
     The Jargon file 3.0.0 claims that on some versions of
     Multics one was required to enter a password to log out but
     James J. Lippard , who was a Multics
     developer in Phoenix, believes this to be an urban legend.
     He never heard of a version of Multics which required a
     password to logout.  Tom Van Vleck 
     agrees.  He suggests that some user may have implemented a
     'terminal locking' program that required a password before one
     could type anything, including logout.
  
     http://multicians.org/)">(http://multicians.org/).
  
     Usenet newsgroup: news:alt.os.multics.
  
     [{Jargon File]
  
     (2002-04-12)
  

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