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Q739186
EntityQ739186· pop 35· linked from 312 articles

Multics ("Multiplexed Information and Computing Service") is an influential early time-sharing operating system based on the concept of a single-level memory. It has been written that Multics "has influenced all modern operating systems since, from microcomputers to mainframes."

Key facts

OS.name
Multics
OS.logo
Multics-logo.svg
OS.logo_size
128px
OS.screenshot
DPS8M emulator running Multics screenshot.webp
OS.caption
Screenshot of Multics 12.8 with login prompt and some commands
OS.developer
MIT, GE, Honeywell, Bell Labs
OS.programmed_in
PL/I, Assembly language
OS.working_state
Mature, current, historic, emulator available
OS.source_model
Open source
OS.latest_release_version
12.8
OS.language
English
OS.supported_platforms
GE-645, Honeywell 6000 series machines (Honeywell 6180, Series-60/Level-68, DPS-8/M mainframes)
OS.kernel_type
Monolithic kernel
OS.ui
Command-line interface
OS.license
Originally proprietary,Free software Multics License since 2007
OS.preceded by
Compatible Time-Sharing System
OS.influenced
Unix, GEORGE 3, ICL VME, PRIMOS, Domain/OS, Stratus VOS

via Wikipedia infobox

~25 min read

Encyclopedic overview

24 sections
Contents
  • Novel ideas
  • Project history
  • Current status
  • Commands
  • File and directory access commands
  • Text editors
  • Document formatters
  • Compilers, assemblers, and interpreters
  • Email
  • On-line documentation
  • Scripting
  • Data processing
  • Login sessions
  • Active functions
  • Retrospective observations
  • Influence on other projects
  • Unix
  • Other operating systems
  • See also
  • References
  • Further reading
  • Technical details
  • Security
  • External links

Multics ("Multiplexed Information and Computing Service") is an influential early time-sharing operating system based on the concept of a single-level memory. It has been written that Multics "has influenced all modern operating systems since, from microcomputers to mainframes."

Initial planning and development for Multics started in 1964, in Cambridge, Massachusetts. Originally it was a cooperative project led by MIT (Project MAC with Fernando Corbató) along with General Electric and Bell Labs. It was developed on the GE 645 computer, which was specially designed for it; the first one was delivered to MIT in January 1967. GE offered their earlier GE 635 systems with the Dartmouth Time-Sharing System, which they called "Mark I" and intended to offer the 645 with Multics as a larger successor. Bell withdrew from the project in 1969 as it became clear it would not deliver a working system in the short term. Shortly thereafter, GE decided to exit the computer industry entirely and sold the division to Honeywell in 1970. Honeywell offered Multics commercially, but with limited success.

Excerpted from Wikipedia’s “Q739186” article, available under the CC BY-SA 4.0 licence.

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