Timeline of Operating Systems - 1970s

1970s

• 1970
  • DOS-11 (PDP-11)
• 1971
  • RSTS-11 2A-19 (First released version; PDP-11)
  • OS/8
• 1972
  • RDOS
  • SVS
  • VM/CMS
  • MUSIC/SP
• 1973
  • Эльбрус-1 (Elbrus-1) – Soviet computer – created using high-level language uЭль-76 (AL-76/ALGOL 68).
  • VME – implementation language S3 (ALGOL 68).
  • RSX-11D
  • RT-11
  • Alto OS
• 1974
  • DOS-11 V09-20C (Last stable release, June 1974)
  • SINTRAN III
  • MONECS
• 1975
  • CP/M
  • BS2000 V2.0 (First released version)
  • Sixth Edition Unix
• 1976
  • Cambridge CAP computer – All operating system procedures written in ALGOL 68C, with some closely associated protected procedures in BCPL.
  • Cray Operating System
  • FLEX
  • TOPS-20
• 1977
  • 1BSD
  • KERNAL
  • OASIS operating system
  • TRS-DOS
  • Virtual Memory System (VMS) V1.0 (Initial commercial release, October 25)
• 1978
  • 2BSD
  • Apple DOS
  • HDOS 1.0
  • TripOS
  • UCSD p-System (First released version)
  • Lisp Machine (CADR)
• 1979
  • Atari DOS
  • POS
  • NLTSS
  • UNIX/32V
  • Version 7 Unix