Editing Timeline of operating systems (section)

==1990s==
* 1990
** [[IBM AIX|AIX]] 3.0
** [[AmigaOS]] 2.0
** [[BeOS]] (v1)
** [[DOS/V]]
** [[Genera (operating system)|Genera]] 8.0
** [[iS-DOS]]
** LOCK<ref>{{cite web|url=http://www.cyberdefenseagency.com/publications/LOCK-An_Historical_Perspective.pdf |title=LOCK-An Historical Perspective |publisher=Cyberdefenseagency.com |access-date=2019-01-28}}</ref> – [[Trusted Computer System Evaluation Criteria|TCSEC]] A1-class secure system with kernel and hardware support for [[type enforcement]]
** MVS/ESA SP Version 4 
** [[NetWare|Novell NetWare]] 3
** [[OS/2]] 1.3
** [[OSF/1]]
** [[RTEMS]]
** [[GEOS (16-bit operating system)|PC/GEOS]]
** [[Windows 3.0]] <!-- 'Windows' [3.0] is not an operating system (OS), but a graphical environment/shell -->
** [[VM (operating system)|Virtual Machine/Enterprise Systems Architecture]] (VM/XA ESA)
** [[VSE (operating system)|VSE/Enterprise Systems Architecture]] (VSE/ESA) Version 1<ref>{{cite web
 | title       = IBM VSE/ENTERPRISE SYSTEMS ARCHITECTURE VERSION 1 RELEASE 1
 | id          = LTR 290-785
 | date        = December 18, 1990
 | url         = https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/5/897/ENUS290-785/index.html
 | work        = Announcement Letters
 | publisher   = [[IBM]]
 | access-date = March 26, 2023
 }}
</ref>
* 1991
** [[Amoeba (operating system)|Amoeba]] – microkernel-based, POSIX-compliant, distributed OS
** [[GNO/ME]]
** [[Linux kernel|Linux]] 0.01-0.1
** [[Classic Mac OS|Mac OS]] (''[[System 7]]'')
** [[MINIX]] 1.5
** [[PenPoint OS]]
** [[RISC OS]] 3<ref>{{citation
|url        = http://www.wrocc.org.uk/riscos/history.shtml
|title      = A Brief History of RISC OS
|work       = Wakefield RISC OS Computer Club
|access-date = 2011-11-19
}}</ref>
** [[SUNMOS]]
** Trusted Xenix<ref>{{cite web|url=http://webapp1.dlib.indiana.edu/virtual_disk_library/index.cgi/1347159/FID1806/epl/entries/csc-epl-92-001.html|title=EPL Entry CSC-EPL-92/001|access-date=March 15, 2015}}</ref> – rewritten & security enhanced Xenix evaluated at [[Trusted Computer System Evaluation Criteria|TCSEC]] B2-class
* 1992
** [[386BSD]] 0.1
** [[Amiga Unix]] 2.01 (''Latest stable release'')
** [[AmigaOS]] 3.0
** [[BSD/OS|BSD/386]], by [[Berkeley Software Design|BSDi]] and later known as BSD/OS.
** [[Yggdrasil Linux/GNU/X|LGX]]
** [[OpenVMS]] V1.0 (''First OpenVMS AXP (Alpha) specific version, November 1992'')
** [[OS/2]] 2.0 (First i386 32-bit based version)
** [[Plan 9 from Bell Labs|Plan 9]] First Edition (''First public release was made available to universities'')
** [[RSTS/E]] 10.1 (''Last stable release, September 1992'')
** [[Softlanding Linux System|SLS]]
** [[Oracle Solaris|Solaris]] 2.0 (''Successor to SunOS 4.x; based on SVR4 instead of BSD'')
** [[Windows 3.1]] <!-- following comment is not reflected in "Windows 3.1" article: ('Windows' [3.1] is Not an Operating System (OS), but a shell) -->
* 1993
** [[4690 Operating System|IBM 4690 Operating System]]
** [[FreeBSD]]
** [[NetBSD]]
** [[NetWare|Novell NetWare]] 4
** [[Newton OS]]
** [[Nucleus RTOS]]
** [[Genera (operating system)|Open Genera]] 1.0
** [[OS 2200]] ([[Unisys]])
** [[OS/2]] 2.1
** [[PTS-DOS]]
** [[Slackware]] 1.0
** [[Spring (operating system)|Spring]]
** [[Windows NT 3.1]] (''First Windows NT kernel public release'')
* 1994
** [[IBM AIX|AIX]] 4.0, 4.1
** IBM MVS/ESA SP Version 5 
** [[NetBSD]] 1.0 (''First multi-platform release, October 1994'')
** [[OS/2]] Warp 3.0
** [[Red Hat Linux|Red Hat]]
** [[RISC OS]] 3.5
** [[SPIN (operating system)|SPIN]] – extensible OS written in Modula-3
* 1995
** [[Tru64 UNIX|Digital UNIX]] (''aka'' Tru64 UNIX)
** [[OpenBSD]]
** [[OS/390]]
** [[Plan 9 from Bell Labs|Plan 9]] Second Edition (''Commercial second release version was made available to the general public.'')
** [[SMSQ/E]]
** [[Ultrix]] 4.5 (''Last major release'')
** [[Windows 95]]
* 1996
** [[IBM AIX|AIX]] 4.2
** [[Debian]] 1.1
** JN<ref>{{cite web |url=http://embedded.soe.ucsc.edu/pubs/tr96-29/html/tr96-29.html |title=JN: An Operating System for an Embedded Java Network Computer UCSC-CRL-96-29 |access-date=2014-04-25 |url-status=dead |archive-url=https://web.archive.org/web/20120824010637/http://embedded.soe.ucsc.edu/pubs/tr96-29/html/tr96-29.html |archive-date=August 24, 2012 |df=mdy-all }}</ref> – microkernel OS for embedded, Java apps
** [[Classic Mac OS|Mac OS 7.6]] (''First officially-named Mac OS'')
** [[OS/2]] Warp 4.0
** [[Palm OS]]
** [[RISC OS]] 3.6
** [[Windows NT 4.0]]
** [[Windows Embedded Compact|Windows CE 1.0]]
* 1997
** [[IBM AIX|AIX]] 4.3
** [[DR-WebSpyder]] 1.0
** [[EPOC (operating system)#EPOC32 (1997–2000)|EPOC]] (EPOC32)
** [[Inferno (operating system)|Inferno]]
** [[Mac OS 8]]
** [[MINIX]] 2.0
** [[Nemesis (operating system)|Nemesis]]<ref>various 1997 publications listed on [http://www.cl.cam.ac.uk/research/srg/netos/old-projects/nemesis/documentation.html the Nemesis website], retrieved 2013-08-13</ref>
** [[RISC OS]] 3.7
** [[SkyOS]]
** [[Windows Embedded Compact|Windows CE 2.0]]
* 1998
** [[DR-WebSpyder]] 2.0
** [[Junos]]
** [[Novell NetWare]] 5
** [[RT-11]] 5.7 (''Last stable release, October 1998'')
** [[Solaris (operating system)|Solaris]] 7 (''first [[64-bit computing|64-bit]] Solaris release – names from this point drop "2.", otherwise would've been Solaris 2.7'')
** [[Windows 98]]
* 1999
** [[AmigaOS version history#AmigaOS 3.5, 3.9|Amiga OS 3.5]] ''(unofficial)''
** [[AROS Research Operating System|AROS]] (''Boot for the first time in Stand Alone version'')
** [[Inferno (operating system)|Inferno]] Second Edition (''Last distribution (Release 2.3, {{circa|July 1999}}) from Lucent's Inferno Business Unit'')<ref>{{citation
|url        = http://www.vitanuova.com/inferno/downloads.html
|title      = Inferno Downloads
|work       = [[Vita Nuova Holdings]]
|access-date = 2011-11-19
}}</ref>
** [[Mac OS 9]]
** [[OS/2]] Warp 4.5
** [[RISC OS]] 4
** [[Windows 98 Second Edition|Windows 98 (2nd edition)]]