Editing Timeline of operating systems (section)

==1980s==
* 1980
** [[86-DOS]]
** [[AOS/VS]] (Data General)
** [[Business Operating System (software)|Business Operating System]]
** [[Convergent Technologies Operating System|CTOS]]<ref>{{cite web |url=http://www.byte.com/art/9412/sec13/art2.htm|archive-url=https://web.archive.org/web/20080828190425/http://www.byte.com/art/9412/sec13/art2.htm |archive-date=August 28, 2008|title=CTOS Revealed|author1=Dirk S. Faegre |author2=Jon Udell|date=December 1994 |publisher=BYTE.com|url-status=dead}}</ref>
** MVS/System Product (MVS/SP) V1
** [[NewDos/80]]
** [[OS-9]]
** [[RMX (operating system)|RMX-86]]
** [[Color BASIC|RS-DOS]]
** [[Apple SOS|SOS]]
** [[VM (operating system)|Virtual Machine/System Product]] (VM/SP)
** [[Xenix]]
* 1981
** [[Acorn MOS]]
** [[Domain/OS|Aegis]] SR1 (''First Apollo/DOMAIN systems shipped on March 27''<ref>{{cite web|url=http://www.zepa.net/apollo/|title=Apollo/DOMAIN Computers|access-date=March 15, 2015}}</ref>)
** [[CP/M-86]]
** [[Intel iAPX 432|iMAX]] – OS for Intel's iAPX 432 capability machine
** [[Wicat Systems|MCS]] (Multi-user Control System)
** [[MS-DOS]]
** [[IBM PC DOS|PC DOS]]
** [[Pilot (operating system)|Pilot]] (''[[Xerox Star]] operating system'')
** [[UNOS (operating system)|UNOS]]
** [[Amdahl UTS|UTS]]
** [[V (operating system)|V]]
** [[VERSAdos]]<ref>{{cite web|url=https://vintageapple.org/byte/pdf/198106_Byte_Magazine_Vol_06-06_Operating_Systems.pdf |title=Byte (magazine) |date=1981-06-01 |access-date=2024-03-29}}</ref>
** [[Versatile Real-Time Executive|VRTX]]
** [[CDC Cyber#CDC CYBER 205|VSOS]] (Virtual Storage Operating System)<ref>{{cite web|url=https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1376&context=cstech |title=Implemeting a scalar C compiler on the Cyber 205 |last1=Li |first1=Kuo-Cheng |last2=Schwetman |first2=Herb |publisher=Purdue University |date=1983-10-06 |access-date=2024-03-28}}</ref>
** [[Xinu]] first release
* 1982
** [[Commodore DOS]]
** [[Logical Disk Operating System|LDOS]] (By Logical Systems, Inc. – for the Radio Shack TRS-80 Models I, II & III)
** [[Olivetti M20#PCOS|PCOS]] (Olivetti M20)
** [[pSOS (real-time operating system)|pSOS]]
** [[QNX]]
** [[Stratus VOS]]<ref>{{cite web |url=http://ftp.stratus.com:80/vos/doc/reference/machine_history.txt |last=Green |first=Paul |date=20 May 2002 |title=Stratus Machine History |website=ftp.stratus.com:80 |access-date=13 January 2022 |archive-url=https://web.archive.org/web/20030612194052/http://ftp.stratus.com:80/vos/doc/reference/machine_history.txt |archive-date=12 June 2003 |url-status=dead}}</ref>
** Sun UNIX (later [[SunOS]]) 0.7
** [[Ultrix]]
** [[Unix System III]]
** [[VAXELN]]
* 1983
** [[Coherent (operating system)|Coherent]]
** [[DNIX]]
** [[EOS (8-bit operating system)|EOS]]
** [[GNU]] (''project start'')
** [[Apple Lisa|Lisa Office System 7/7]]
** LOCUS<ref>{{cite tech report |last1=Walker |first1=Bruce |last2=Popek |first2=Gerald |last3=English |first3=Robert |last4=Kline |first4=Charles |last5=Thiel |first5=Greg |date= |title=The LOCUS Distributed Operating System |institution=University of California at Los Angeles |number= |url=https://pages.cs.wisc.edu/~bart/736/papers/locus.pdf }}</ref> – UNIX compatible, high reliability, distributed OS
** MVS/System Product V2 (MVS/Extended Architecture, MVS/XA)
** [[NetWare|Novell NetWare]] ([[Novell S-Net|S-Net]])
** [[Computer Consoles Inc.#PERPOS, Perpetual Processing Operating System|PERPOS]]
** [[Apple ProDOS|ProDOS]]
** [[Concurrent Computer Corporation#Merger with MASSCOMP|RTU]] (Real-Time Unix)
** STOP<ref>{{cite web |url=http://apps.dtic.mil/dtic/tr/fulltext/u2/a229523.pdf |archive-url=https://web.archive.org/web/20150924072244/http://www.dtic.mil/dtic/tr/fulltext/u2/a229523.pdf |url-status=live |archive-date=September 24, 2015 |title=FINAL EVALUATION REPORTM OFN SCOMP |date=1965 |website=www.dtic.mil |access-date=2020-09-14}}</ref> – [[Trusted Computer System Evaluation Criteria|TCSEC]] A1-class, secure OS for SCOMP hardware
** [[SunOS]] 1.0
** [[VSE (operating system)|VSE/System Package]] (VSE/SP) Version 1<ref>{{cite web
 | title       = NEW VSE SYSTEM IPO/E 1.4.0 AND VSE/SYSTEM PACKAGE 1.1.0
 | id          = LTR 283-217
 | date        = July 19, 1983
 | url         = https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/7/897/ENUS283-217/index.html
 | work        = Announcement Letters
 | publisher   = [[IBM]]
 | access-date = March 26, 2023
 }}
</ref>
* 1984
** [[AMSDOS]]
** [[Convergent Technologies|CTIX]] (Unix variant)
** [[DYNIX]]
** [[Classic Mac OS|Mac OS]] (''System 1.0'')
** [[MSX-DOS]]
** [[NOS/VE]]<ref>{{cite web|url=https://www.uwyo.edu/infotech/aboutit/history/cyber-era.asp |title=University of Wyoming &ndash; Information Technology: About IT: History &ndash; The Cyber Era |access-date=2024-03-28}}</ref><ref>{{cite web|url=https://www.youtube.com/watch?v=HvLlfXZMBXg |title=Westinghouse & Control Data Corporation - NOS/VE (1984) |date=July 17, 2011 |publisher=Westinghouse |access-date=2024-03-28}}</ref>
** [[Panos (operating system)|PANOS]]
** [[PC/IX]]
** [[Ridge Computers|ROS]]
** [[Sinclair QDOS]]
** [[QNX]]
** [[SINIX]]
** [[UNICOS]]
** [[Venix]] 2.0
** [[VM (operating system)|Virtual Machine/Extended Architecture Migration Assistance]] (VM/XA MA)
* 1985
** [[AmigaOS]]
** [[Atari TOS]]
** [[DG/UX]]
** [[DOS Plus]]
** [[GEM (desktop environment)|Graphics Environment Manager]]
** [[Harmony (operating system)|Harmony]]
** [[MIPS RISC/os]]
** [[Oberon (operating system)|Oberon]] – written in [[Oberon (programming language)|Oberon]]
** [[SunOS]] 2.0
** [[Version 8 Unix]]
** [[VM (operating system)|Virtual Machine/Extended Architecture System Facility]] (VM/XA SF)
** [[Windows 1.0]]
** [[Windows 1.0]]1 <!-- following comment is not reflected in "Windows 1.0" article: ('Windows' [1.0] is Not an Operating System (OS), but a shell)-->
** [[Xenix]] 2.0
* 1986
** [[IBM AIX|AIX]] 1.0
** Cronus distributed OS<ref>Vinter, S. T. and Schantz, R. E. 1986. The Cronus distributed operating system. In Proceedings of the 2nd Workshop on Making Distributed Systems Work (Amsterdam, Netherlands, September 8–10, 1986). EW 2. ACM, New York, NY, 1-3.</ref>
** [[FlexOS]]
** GEMSOS<ref>{{cite web |url=http://www.aesec.com/eval/NCSC-FER-94-008.pdf |title= Final evaluation report |date=June 28, 1995 |website= www.aesec.com|access-date=2020-09-14}}</ref> – [[Trusted Computer System Evaluation Criteria|TCSEC]] A1-class, secure kernel for BLACKER VPN & GTNP
** [[GEOS (8-bit operating system)|GEOS]]
** [[Genera (operating system)|Genera]] 7.0
** [[HP-UX]]
** [[SunOS]] 3.0
** [[TR-DOS]]
** [[TRIX (operating system)|TRIX]]
** [[Version 9 Unix]]
* 1987
** [[History of RISC OS|Arthur]] (much improved version came in 1989 under the name [[RISC OS]])
** [[BS2000]] V9.0
** [[IRIX]] (''3.0 is first SGI version'')
** [[Myarc Disk Operating System|MDOS]]
** [[MINIX]] 1.0
** [[OS/2]] (1.0)
** [[PC-MOS/386]]
** Topaz<ref>{{cite tech report |last1=Thacker |first1=Charles P. |last2=Stewart |first2=Lawrence C. |date=1987 |title=Firefly: A Multiprocessor Workstation |institution=Digital Equipment Corporation — Systems Research Center |number= |url=http://bitsavers.trailing-edge.com/pdf/dec/tech_reports/SRC-RR-23.pdf }}</ref> – semi-distributed OS for DEC Firefly workstation written in Modula-2+ and garbage collected
** [[Windows 2.0]] <!-- following comment is not reflected in "Windows 2.0" article: ('Windows' [2.0] is Not an Operating System (OS), but a shell) -->
* 1988
** [[A/UX]] (Apple Computer)
** [[AOS/VS II]] (Data General)
** [[CP/M]] rebranded as [[DR-DOS]]
** [[Flex machine]] – tagged, capability machine with OS and other software written in ALGOL 68RS
** [[Apple GS/OS|GS/OS]]
** [[HeliOS]] 1.0
** [[KeyKOS]] – capability-based microkernel for IBM mainframes with automated persistence of app data
** [[LynxOS]]
** [[Classic Mac OS|Mac OS]] (''[[System 6]]'')
** MVS/System Product V3 (MVS/Enterprise Systems Architecture, MVS/ESA)
** [[OS/2]] (1.1)
** [[IBM i|OS/400]]
** [[RISC iX]]
** [[SpartaDOS X]]
** [[SunOS]] 4.0
** [[TOPS-10]] 7.04 (''Last stable release, July 1988'')
** [[VM (operating system)|Virtual Machine/Extended Architecture System Product]] (VM/XA SP)
** VAX VMM<ref>{{Cite journal
 |      journal = IEEE Journal of Software Engineering
 |        title = A Retrospective on the VAX VMM Security Kernel
 |       volume = 17
 |        issue = 11
 |        pages = 1147–1165
 |         date = November 1991
 |      author1 = Paul A. Karger
 |      author2 = Mary Ellen Zurko
 |      author3 = Douglass W. Bonin
 |      author4 = Andrew H. Mason
 |      author5 = Clifford E. Kahn
 | doi = 10.1109/32.106971
 |          url = http://www.cs.dartmouth.edu/~ccpalmer/classes/cs55/Content/resources/vax_vmm.pdf
 |  access-date = May 2, 2014
 |  archive-url = https://web.archive.org/web/20151112124406/http://www.cs.dartmouth.edu/~ccpalmer/classes/cs55/Content/Resources/vax_vmm.pdf
 | archive-date = November 12, 2015
 |   url-status = dead
 |   df         = mdy-all
 }}
</ref> – [[Trusted Computer System Evaluation Criteria|TCSEC]] A1-class, [[Virtual Machine Manager|VMM]] for [[VAX]] computers (limited use before cancellation)
* 1989
** Army Secure Operating System (ASOS)<ref>{{cite report
 |     title = Quarterly Status Report - Report #1 
 |        id = AD-A206 308
 |      date = 15 March 1989
 |      work = Advance Computing Systems: An Advanced Reasoning-Based Paradigm for Ada Trusted Systems and its Application to MACH
 |       url = https://apps.dtic.mil/dtic/tr/fulltext/u2/a206308.pdf
 |       archive-url = https://web.archive.org/web/20210602213045/https://apps.dtic.mil/dtic/tr/fulltext/u2/a206308.pdf
 |       url-status = live
 |       archive-date = June 2, 2021
 |       via = [[Defense Technical Information Center]] (DTIC)
 | publisher = TRW - Federal Systems Group - Systems Division
 }}</ref> – [[Trusted Computer System Evaluation Criteria|TCSEC]] A1-class secure, real-time OS for [[Ada (programming language)|Ada]] applications
** [[EPOC (operating system)|EPOC]] (EPOC16)
** [[NeXTSTEP]] (1.0)
** [[OS/2]] (1.2)
** [[RISC OS]] (''First release was to be called Arthur 2, but was renamed to RISC OS 2, and was first sold as RISC OS 2.00 in April 1989'')
** [[OpenServer|SCO UNIX]] (''Release 3'')
** [[TSX-32]]
** [[Version 10 Unix]]
** [[Xenix]] 2.3.4 (''Last stable release'')