NOS (operating system)

NOS
Login procedure
DeveloperControl Data Corporation
Working stateHistoric
Initial release1975; 49 years ago (1975)
Latest releaseNOS 2.8.7 L871 (Y2K fixed)[1]
Marketing targetMainframe computers
PlatformsCDC 6000 series and successors
LicenseProprietary
CDC NOS Version 1 Terminal User's Instant Manual
A batch file to get the file STARTRK and output it to the card punch

NOS (Network Operating System) is a discontinued operating system with time-sharing capabilities, written by Control Data Corporation in 1975.[2]

NOS ran on the 60-bit CDC 6000 series of mainframe computers and their successors. NOS replaced the earlier CDC Kronos operating system of the 1970s. NOS was intended to be the sole operating system for all CDC machines, a fact CDC promoted heavily. NOS was replaced with NOS/VE on the 64-bit Cyber-180 systems in the mid-1980s.

Version 1 of NOS continued to be updated until about 1981; NOS version 2 was released early 1982.

  1. ^ "Installation (NOS 2.8.7) [CDC Community]".
  2. ^ "CDC Operating System History Mar76" (PDF). Control Data Corporation. Retrieved 7 March 2023.