Timeline of operating systems

This article presents a timeline of events in the history of computer operating systems from 1951 to the current day. For a narrative explaining the overall developments, see the History of operating systems.

20th Century

1940s

1949
EDSAC was considered the first operating system developed by Maurice Wilkes and manufactured by the University of Cambridge

1950s

1951
LEO I 'Lyons Electronic Office' was the commercial development of EDSAC computing platform, supported by British firm J. Lyons and Co.
1953
DYSEAC - an early machine capable of distributing computing
1955
General Motors Operating System made for IBM 701
MIT's Tape Director operating system made for UNIVAC 1103
1956
GM-NAA I/O for IBM 704, based on General Motors Operating System
1957
Atlas Supervisor (Manchester University) (Atlas computer project start)
BESYS (Bell Labs), for IBM 704, later IBM 7090 and IBM 7094
1958
University of Michigan Executive System (UMES), for IBM 704, 709, and 7090
1959
SHARE Operating System (SOS), based on GM-NAA I/O

1960s

1960
IBSYS (IBM for its 7090 and 7094)
1961
CTSS demonstration (MIT's Compatible Time-Sharing System for the IBM 7094)
MCP (Burroughs Master Control Program) for B5000

1962
Atlas Supervisor (Manchester University) (Atlas computer commissioned)
BBN Time-Sharing System
GCOS (GE's General Comprehensive Operating System, originally GECOS, General Electric Comprehensive Operating Supervisor)
1963
ADMIRAL
AN/FSQ-32, another early time-sharing system begun
CTSS becomes operational (MIT's Compatible Time-Sharing System for the IBM 7094)
JOSS, an interactive time-shared system that did not distinguish between operating system and language
Titan Supervisor, early time-sharing system begun
1964
Berkeley Timesharing System (for Scientific Data Systems' SDS 940)
Chippewa Operating System (for CDC 6600 supercomputer)
Dartmouth Time-Sharing System (Dartmouth College's DTSS for GE computers)
EXEC 8 (UNIVAC)
KDF9 Timesharing Director (English Electric) – an early, fully hardware secured, fully pre-emptive process switching, multi-programming operating system for KDF9 (originally announced in 1960)
OS/360 (IBM's primary OS for its S/360 series) (announced)
PDP-6 Monitor (DEC) descendant renamed TOPS-10 in 1970
SCOPE (CDC 3000 series)
1965
BOS/360 (IBM's Basic Operating System)
DECsys
TOS/360 (IBM's Tape Operating System)
Livermore Time Sharing System (LTSS)
Multics (MIT, GE, Bell Labs for the GE-645) (announced)
Pick operating system
SIPROS 66 (Simultaneous Processing Operating System)
THE multiprogramming system (Technische Hogeschool Eindhoven) development
TSOS (later VMOS) (RCA)
1966
DOS/360 (IBM's Disk Operating System)
GEORGE 1 & 2 for ICT 1900 series
Mod 1
Mod 2
Mod 8
MS/8 (Richard F. Lary's DEC PDP-8 system)
MSOS (Mass Storage Operating System)
OS/360 (IBM's primary OS for its S/360 series) PCP and MFT (shipped)
RAX
Remote Users of Shared Hardware (RUSH), a time-sharing system developed by Allen-Babcock for the IBM 360/50
SODA for Elwro's Odra 1204
Universal Time-Sharing System (XDS Sigma series)
1967
CP-40, predecessor to CP-67 on modified IBM System/360 Model 40
CP-67 (IBM, also known as CP/CMS)
Conversational Programming System (CPS), an IBM time-sharing system under OS/360
Michigan Terminal System (MTS) (time-sharing system for the IBM S/360-67 and successors)
ITS (MIT's Incompatible Timesharing System for the DEC PDP-6 and PDP-10)
OS/360 MVT
ORVYL (Stanford University's time-sharing system for the IBM S/360-67)
TSS/360 (IBM's Time-sharing System for the S/360-67, never officially released, canceled in 1969 and again in 1971)
WAITS (SAIL, Stanford Artificial Intelligence Laboratory, time-sharing system for DEC PDP-6 and PDP-10, later TOPS-10)
1968
Airline Control Program (ACP) (IBM)
B1 (NCR Century series)
CALL/360, an IBM time-sharing system for System/360
HP Real-Time Executive (HP RTE) – Hewlett-Packard
HP Time-Shared BASIC (HP TSB) – Hewlett-Packard
B3 (NCR Century series)
Multics (MIT, GE, Bell Labs for the GE-645 and later the Honeywell 6180) (opened for paying customers in October)
RC 4000 Multiprogramming System (RC)
TENEX (Bolt, Beranek and Newman for DEC systems, later TOPS-20)
Unics (later Unix) (AT&T, initially on DEC computers)
Xerox Operating System

1970s

1970
DOS-11 (PDP-11)
1971
EMAS
Kronos
RSTS-11 2A-19 (First released version; PDP-11)
RSX-15
OS/8
1972
B4 (NCR Century series)
DOS-11 V09-20C (Last stable release, June 1974)
Hydra – capability-based, multiprocessing OS kernel
MONECS
Multi-Programming Executive (MPE) – Hewlett-Packard
Operating System/Virtual Storage 2 R2 (MVS)
OS/7
OS/16
OS/32
Sintran III
1975
BS2000 V2.0 (First released version)
COS-350
ISIS
NOS (Control Data Corporation)
OS/3 (Univac)
VS/9 (formerly RCA's TSOS, later named VMOS)
Version 6 Unix
XVM/DOS
XVM/RSX
1976
Cambridge CAP computer – all operating system procedures written in ALGOL 68C, with some closely associated protected procedures in BCPL
Cray Operating System
DX10
FLEX
TOPS-20
TX990/TXDS
Tandem Nonstop OS v1
Thoth
1977
1BSD
AMOS
KERNAL
OASIS operating system
OS68
OS4000
RMX-80
System 88 (Exec)
System Support Program (IBM System/34 and System/36)
TRSDOS
Virtual Memory System (VMS) V1.0 (Initial commercial release, October 25)
VRX (Virtual Resource eXecutive)
VS Virtual Memory Operating System
1978
2BSD
Apple DOS
Control Program Facility (IBM System/38)
Cray Time Sharing System (CTSS)
DPCX (IBM)
DPPX (IBM)
HDOS
KSOS – secure OS design from Ford Aerospace
KVM/370 – security retro-fit of IBM VM/370
Lisp machine (CADR)
MVS/System Extensions (MVS/SE)
OS4 (Naked Mini 4)
PTDOS
TRIPOS
UCSD p-System (First released version)
Z80-RIO
1979
Atari DOS
3BSD
CP-6
Idris
MP/M
MVS/System Extensions R2 (MVS/SE2)
NLTSS
POS
Sinclair BASIC
Transaction Processing Facility (TPF) (IBM)
UCLA Secure UNIX – an early secure UNIX OS based on security kernel
UNIX/32V
DOS/VSE
Version 7 Unix

1980s

1980
86-DOS
AOS/VS (Data General)
Business Operating System
CTOS
DOSPLUS (TRS-80)
MVS/System Product (MVS/SP) V1
NewDos/80
OS-9
RMX-86
RS-DOS
SOS
Virtual Machine/System Product (VM/SP)
Xenix
1981
Acorn MOS
Aegis SR1 (First Apollo/DOMAIN systems shipped on March 27)
CP/M-86
DRX (Distributed Resource Executive)
iMAX – OS for Intel's iAPX 432 capability machine
MCS (Multi-user Control System)
MS-DOS
PC DOS
Pilot (Xerox Star operating system)
UNOS
UTS
V
VERSAdos
VRTX
VSOS (Virtual Storage Operating System)
Xinu first release
1982
Commodore DOS
LDOS (By Logical Systems, Inc. – for the Radio Shack TRS-80 Models I, II & III)
PCOS (Olivetti M20)
pSOS
QNX
Stratus VOS
Sun UNIX (later SunOS) 0.7
Ultrix
Unix System III
VAXELN
1983
Coherent
DNIX
EOS
GNU (project start)
Lisa Office System 7/7
LOCUS – UNIX compatible, high reliability, distributed OS
MVS/System Product V2 (MVS/Extended Architecture, MVS/XA)
Novell NetWare (S-Net)
PERPOS
ProDOS
RTU (Real-Time Unix)
STOP – TCSEC A1-class, secure OS for SCOMP hardware
SunOS 1.0
VSE/System Package (VSE/SP) Version 1
1984
AMSDOS
CTIX (Unix variant)
DYNIX
Mac OS (System 1.0)
MSX-DOS
NOS/VE
PANOS
PC/IX
ROS
Sinclair QDOS
SINIX
UNICOS
Venix 2.0
Virtual Machine/Extended Architecture Migration Assistance (VM/XA MA)
1985
AmigaOS
Atari TOS
DG/UX
DOS Plus
Graphics Environment Manager
Harmony
MacOS 2
MIPS RISC/os
Oberon – written in Oberon
SunOS 2.0
Version 8 Unix
Virtual Machine/Extended Architecture System Facility (VM/XA SF)
Windows 1.0
Windows 1.01
Xenix 2.0
1986
AIX 1.0
Cronus distributed OS
FlexOS
GEMSOS – TCSEC A1-class, secure kernel for BLACKER VPN & GTNP
GEOS
Genera 7.0
HP-UX
MacOS 3
SunOS 3.0
TR-DOS
TRIX
Version 9 Unix
1987
Arthur (much improved version came in 1989 under the name RISC OS)
BS2000 V9.0
IRIX (3.0 is first SGI version)
MacOS 4
MacOS 5
MDOS
MINIX 1.0
OS/2 (1.0)
PC-MOS/386
Topaz – semi-distributed OS for DEC Firefly workstation written in Modula-2+ and garbage collected
VxWorks
Windows 2.0
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
GS/OS
HeliOS 1.0
KeyKOS – capability-based microkernel for IBM mainframes with automated persistence of app data
LynxOS
Mac OS (System 6)
MVS/System Product V3 (MVS/Enterprise Systems Architecture, MVS/ESA)
OS/2 (1.1)
OS/400
RISC iX
SpartaDOS X
SunOS 4.0
TOPS-10 7.04 (Last stable release, July 1988)
Virtual Machine/Extended Architecture System Product (VM/XA SP)
VAX VMM – TCSEC A1-class, VMM for VAX computers (limited use before cancellation)
1989
Army Secure Operating System (ASOS) – TCSEC A1-class secure, real-time OS for Ada applications
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)
SCO UNIX (Release 3)
TSX-32
Version 10 Unix
Xenix 2.3.4 (Last stable release)

1990s

1990
AIX 3.0
AmigaOS 2.0
BeOS (v1)
DOS/V
Genera 8.0
iS-DOS
LOCK – TCSEC A1-class secure system with kernel and hardware support for type enforcement
MVS/ESA SP Version 4
Novell NetWare 3
OS/2 1.3
OSF/1
RTEMS
PC/GEOS
Windows 3.0
Virtual Machine/Enterprise Systems Architecture (VM/XA ESA)
VSE/Enterprise Systems Architecture (VSE/ESA) Version 1
1991
Amoeba – microkernel-based, POSIX-compliant, distributed OS
GNO/ME
Linux 0.01-0.1
Mac OS (System 7)
MINIX 1.5
PenPoint OS
RISC OS 3
SUNMOS
Trusted Xenix – rewritten & security enhanced Xenix evaluated at TCSEC B2-class
1992
386BSD 0.1
Amiga Unix 2.01 (Latest stable release)
AmigaOS 3.0
ANDOS (DOS-like operating system for the Electronika BK series computers)
BSD/386, by BSDi and later known as BSD/OS.
LGX
MPE/iX 4.0
MagiC (as Mag!X or MagiX)
OpenVMS V1.0 (First OpenVMS AXP (Alpha) specific version, November 1992)
OS/2 2.0 (First i386 32-bit based version)
Plan 9 First Edition (First public release was made available to universities)
RSTS/E 10.1 (Last stable release, September 1992)
SLS
Solaris 2.0 (Successor to SunOS 4.x; based on SVR4 instead of BSD)
Windows 3.1
1993
IBM 4690 Operating System
FreeBSD
NetBSD
Novell NetWare 4
Newton OS
Nucleus RTOS
Open Genera 1.0
OS 2200 (Unisys)
OS/2 2.1
PTS-DOS
Slackware 1.0
Spring
Windows NT 3.1 (First Windows NT kernel public release)
1994
AIX 4.0, 4.1
FreeDOS (project start)
IBM MVS/ESA SP Version 5
Linux 1.0.0
NetBSD 1.0 (First multi-platform release, October 1994)
OS/2 Warp 3.0
PlayStation
Red Hat
RISC OS 3.5
SPIN – extensible OS written in Modula-3
1995
Digital UNIX (aka Tru64 UNIX)
OpenBSD
OS/390
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
AIX 4.2
Debian 1.1
JN – microkernel OS for embedded, Java apps
Linux 2.0
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 CE 1.0
1997
AIX 4.3
DR-WebSpyder 1.0
EPOC (EPOC32)
Inferno
Mac OS 8
MINIX 2.0
Nemesis
RISC OS 3.7
SkyOS
Windows CE 2.0
Windows NT 5.0
1998
DR-WebSpyder 2.0
Junos
Novell NetWare 5
RT-11 5.7 (Last stable release, October 1998)
Solaris 7 (first 64-bit Solaris release – names from this point drop "2.", otherwise would've been Solaris 2.7)
Windows 98
1999
Amiga OS 3.5 (unofficial)
AROS (Boot for the first time in Stand Alone version)
Inferno Second Edition (Last distribution (Release 2.3, ) from Lucent's Inferno Business Unit)
Mac OS 9
OS/2 Warp 4.5
RISC OS 4
Windows 98 (2nd edition)

21st Century

2000s

{| class="wikitable sortable"

! Year–month || Microsoft || Apple || BSD || Linux || Others

| 2000–01 || || || || ||

| 2000–02 || Windows 2000 || || || || Solaris 8

| 2000–03 || || || FreeBSD 4.0 || Red Hat Linux 6.2E || AtheOS BeOS R5 PlayStation 2

| 2000–04 || Pocket PC 2000 || || || ||

| 2000–05 || || || || || MenuetOS

| 2000–06 || Windows CE 3.0 || || OpenBSD 2.7 || || Plan 9 Third Edition

| 2000–07 || Windows 2000 Service Pack 1 || || || || OS/400 V4R5

| 2000–08 || || || || Debian 2.2 || MorphOS 0.1

| 2000–09 || Windows Millennium Edition || Mac OS X Public Beta || ||SUSE Linux 7.0 ||

| 2000–10 || Windows Whistler || || || || z/OS z/VM MorphOS 0.2

| 2000–11 || || || || ||

| 2000–12 || || || NetBSD 1.5 OpenBSD 2.8 || || AmigaOS 3.9 HP-UX 11i

| 2001–01 || || Mac OS 9.1 || || ||

| 2001–02 || || || || || MorphOS 0.4

| 2001–03 || || Mac OS X Cheetah (v10.0) || || ||

| 2001–04 || || || || ||

| 2001–05 || Windows 2000 Service Pack 2 || || || || AIX 5L 5.1 OS/400 V5R1

| 2001–06 || || || OpenBSD 2.9 || ||

| 2001–07 || || Mac OS 9.2 || || || eComStation 1.0

| 2001–08 || || || || || Haiku

| 2001–09 || || Mac OS X Puma (v10.1) || || ||

| 2001–10 || Pocket PC 2002 Windows XP Windows XP 64-bit Edition 2002 || || || || Novell NetWare 6.0

| 2001–11 || Xbox || || || ||

| 2001–12 || || || OpenBSD 3.0 || || OS/2 4.52

| 2002–01 || Windows CE 4.x || || || || JX microkernel for Java Sanos microkernel for net appliances K42 microkernel for NUMA machines

| 2002–02 || || || || ||

| 2002–03 || || || || Red Hat Enterprise Linux 2.1 AS ||

| 2002–04 || || || || SUSE Linux 8.0 || Plan 9 Fourth Edition

| 2002–05 || || || OpenBSD 3.1 || || Solaris 9 (SPARC)

| 2002–06 || || || || ||

| 2002–07 || || || || Debian 3.0 || Syllable 0.4.0

| 2002–08 || Windows 2000 Service Pack 3 || Mac OS X Jaguar (v10.2) || || || OS/400 V5R2

| 2002–09 || Windows XP Service Pack 1 || || NetBSD 1.6 || || OS2000

| 2002–10 || || || || || AIX 5.2

| 2002–11 || || || OpenBSD 3.2 || || MorphOS 1.0

| 2002–12 || || || || || MorphOS 1.1

| 2003–01 || || || FreeBSD 5.0 || || Solaris 9 (x86) JNode – JavaOS successor

| 2003–02 || || || || || MorphOS 1.2 ReactOS 0.1.0

| 2003–03 || Windows XP 64-bit Edition 2003 || || || || MorphOS 1.3

| 2003–04 || Windows Server 2003 || || || || eComStation 1.1

| 2003–05 || || || OpenBSD 3.3 || Red Hat Enterprise Linux 2.1 ES ||

| 2003–06 || Windows 2000 Service Pack 4 Windows Mobile 2003 || || || || OpenVMS 8.0

| 2003–07 || || || || ||

| 2003–08 || || || || || Novell NetWare 6.5 MorphOS 1.4

| 2003–09 || || || || || HP-UX 11i v2

| 2003–10 || || Mac OS X Panther (v10.3) || || Red Hat Enterprise Linux 3 SUSE Linux 9.0 ||

| 2003–11 || || || OpenBSD 3.4 || Fedora Core 1 ||

| 2003–12 || || || || Linux 2.6.0 || XTS-400

| 2004–01 || || || || Linux 2.6.1 || ReactOS 0.2.0 Roku OS

| 2004–02 || || || || Linux 2.6.2, 2.6.3 ||

| 2004–03 || || || || Linux 2.6.4 || ReactOS 0.2.1

| 2004–04 || || || || Linux 2.6.5 || ReactOS 0.2.2

| 2004–05 || || || OpenBSD 3.5 || Linux 2.6.6 Fedora Core 2 ||

| 2004–06 || || || || || i5/OS V5R3 ReactOS 0.2.3

| 2004–07 || || || DragonFly BSD 1.0 || ||

| 2004–08 || Windows CE 5.x Windows XP Service Pack 2 Windows Longhorn || || || Linux 2.6.8 || AIX 5.3 eComStation 1.2

| 2004–09 || || || || || ReactOS 0.2.4

| 2004–10 || || || || Linux 2.6.9 Ubuntu 4.10 ||

| 2004–11 || || || OpenBSD 3.6 || Fedora Core 3 ||

| 2004–12 || || || NetBSD 2.0 || Linux 2.6.10 ||

| 2005–01 || || || || || Solaris 10 ReactOS 0.2.5

| 2005–02 || || || || Red Hat Enterprise Linux 4 || OpenVMS 8.2 z/VSE

| 2005–03 || Windows Server 2003 Service Pack 1 Windows XP Professional x64 Edition || || || Linux 2.6.11 Novell Open Enterprise Server || MorphOS 1.4.4

| 2005–04 || || Mac OS X Tiger (v10.4) || DragonFly BSD 1.2 || Ubuntu 5.04 || ReactOS 0.2.6 MorphOS 1.4.5

| 2005–05 || Windows Mobile 5.0 Xbox 360 || || OpenBSD 3.7 || ||

| 2005–06 || || || || Linux 2.6.12 Fedora Core 4 Debian 3.1 ||

| 2005–07 || || || || ||

| 2005–08 || || || || Linux 2.6.13 || ReactOS 0.2.7 MorphOS 1.4.5 Classic

| 2005–09 || || || || ||

| 2005–10 || || || || Linux 2.6.14 Ubuntu 5.10 SUSE Linux 10.0 || ReactOS 0.2.8

| 2005–11 || || || FreeBSD 6.0 OpenBSD 3.8 || ||

| 2005–12 || || || NetBSD 3.0 || || ReactOS 0.2.9

| 2006–01 || || || DragonFly BSD 1.4 || Linux 2.6.15 || i5/OS V5R4 Solaris 10 1/06

| 2006–02 || || || || ||

| 2006–03 || Windows Server 2003 R2 || || || Linux 2.6.16 Fedora Core 5 ||

| 2006–04 || || || || ||

| 2006–05 || || || OpenBSD 3.9 || || SymbOS MINIX 3.1.2

| 2006–06 || || || || Linux 2.6.17 Ubuntu 6.06 (LTS) || Solaris 10 6/06

| 2006–07 || || || DragonFly BSD 1.6 || ||

| 2006–08 || || || || || BS2000/OSD v7.0 ReactOS 0.3.0

| 2006–09 || Windows CE 6.0 || || || Linux 2.6.18 || FreeDOS 1.0 OpenVMS 8.3

| 2006–10 || || || || Fedora Core 6 Ubuntu 6.10 Slackware 11.0 ||

| 2006–11 || || || OpenBSD 4.0 || Linux 2.6.19 || AmigaOS 4.0 Solaris 10 11/06 PlayStation 3

| 2006–12 || || || || ||

| 2007–01 ||Windows Vista || || DragonFly BSD 1.8 || Bharat Operating System Solutions ||

| 2007–02 || Windows Mobile 6.0 || || || Linux 2.6.20 || Inferno Fourth Edition

| 2007–03 || Windows Server 2003 Service Pack 2 || || || Red Hat Enterprise Linux 5 || ReactOS 0.3.1

| 2007–04 || || || || Linux 2.6.21 Ubuntu 7.04 Debian 4.0 ||

| 2007–05 || || iPhone OS 1

|| OpenBSD 4.1 || Fedora Linux 7 ||

| 2007–06 || || || || ||

| 2007–07 || || || || Linux 2.6.22 Slackware 12.0 ||

| 2007–08 || || || DragonFly BSD 1.10 || || Solaris 10 8/07

| 2007–09 || || iPhone OS 1.1 || || || HP-UX 11i v3 ReactOS 0.3.3

| 2007–10 || || Mac OS X Leopard (v10.5) || || Linux 2.6.23 Ubuntu 7.10 || OpenVMS 8.3-1H1

| 2007–11 || Windows Home Server || || OpenBSD 4.2 || Fedora Linux 8 gOS || AIX 6.1,

| 2007–12 || || || NetBSD 4.0 || ||

| 2008–01 || || || || Linux 2.6.24 || ReactOS 0.3.4

| 2008–02 || Windows Vista Service Pack 1 Windows Server 2008 || || DragonFly BSD 1.12 FreeBSD 7.0 || ||

| 2008–03 || || || || || IBM i 6.1 Singularity 1.1

| 2008–04 || Windows Mobile 6.1 Windows XP Service Pack 3 || || || Linux 2.6.25 Ubuntu 8.04 (LTS) ||

| 2008–05 || || || OpenBSD 4.3 || Fedora Linux 9 Slackware 12.1 || Solaris 10 5/08 OpenSolaris 2008.05 BS2000/OSD v8.0A

| 2008–06 || || || || SUSE Linux 11.0 || MorphOS 2.0 ReactOS 0.3.5

| 2008–07 || || iPhone OS 2 || DragonFly BSD 2.0 || Linux 2.6.26 ||

| 2008–08 || || || || || STOP 6.5 ReactOS 0.3.6

| 2008–09 || || iPhone OS 2.1 || || Android 1.0 || AmigaOS 4.1 z/OS V1R10 MorphOS 2.1

| 2008–10 || || || || Linux 2.6.27 Ubuntu 8.10 || Solaris 10 10/08 OKL4 3.0

| 2008–11 || || iPhone OS 2.2 || OpenBSD 4.4 || Fedora Linux 10 || Singularity 2.0 ReactOS 0.3.7 Genode 8.11

| 2008–12 || || || || Linux 2.6.28 Slackware 12.2 || MorphOS 2.2 OpenSolaris 2008.11

| 2009–01 || Windows 7 Beta || || || ||

| 2009–02 || || || DragonFly BSD 2.2 || Debian 5.0 Android 1.1 || ReactOS 0.3.8

| 2009–03 || || || || Linux 2.6.29 ||

| 2009–04 || || || NetBSD 5.0 || Ubuntu 9.04 Android Cupcake || ReactOS 0.3.9

| 2009–05 || Windows Mobile 6.5 Windows Vista Service Pack 2 || || OpenBSD 4.5 || || Solaris 10 5/09

| 2009–06 || || iPhone OS 3

|| || Linux 2.6.30 Fedora Linux 11 Palm webOS 1 || AmigaOS 4.1 OpenSolaris 2009.06

| 2009–07 || || || || ||ReactOS 0.3.10

| 2009–08 || || Mac OS X Snow Leopard (v10.6) || || Slackware 13.0 || MorphOS 2.3

| 2009–09 || || iPhone OS 3.1 || DragonFly BSD 2.4 || Linux 2.6.31 Android Donut ||

| 2009–10 || Windows 7 Windows Server 2008 R2 || || OpenBSD 4.6 || Ubuntu 9.10 Android Eclair || Solaris 10 10/09 MorphOS 2.4

| 2009–11 || || || FreeBSD 8.0 || Fedora Linux 12 openSUSE 11.2 ||

| 2009–12 || || || || Linux 2.6.32 || ReactOS 0.3.11

2010s

{| class="wikitable sortable"

! Year–month || Microsoft || Apple || BSD || Linux || Others

| 2010–01 || || || ||Android 2.1 || AmigaOS 4.1 Upd. 1

| 2010–02 || || || || Linux 2.6.33 ||

| 2010–03 || || || || ||

| 2010–04 || || iPhone OS 3.2 || DragonFly BSD 2.6 || Ubuntu 10.04 (LTS) || AmigaOS 4.1 Upd. 2 IBM i 7.1

| 2010–05 || || || OpenBSD 4.7 || Linux 2.6.34 Fedora Linux 13 Android Froyo || eComStation 2.0

| 2010–06 || || iOS 4 || || || MorphOS 2.5 OpenVMS 8.4

| 2010–07 || || || || openSUSE 11.3 ||

| 2010–08 || || || || Linux 2.6.35 ||

| 2010–09 || || iOS 4.1 || || ||Solaris 10 9/10 AIX 7.1

| 2010–10 ||Windows Phone 7|| || DragonFly BSD 2.8 || Linux 2.6.36 Fedora Linux 14 Ubuntu 10.10 || MorphOS 2.6 ReactOS 0.3.12

| 2010–11 || || iOS 4.2 || NetBSD 5.1 OpenBSD 4.8 || Red Hat Enterprise Linux 6 ||

| 2010–12 || || || || Android Gingerbread ||MorphOS 2.7

| 2011–01 || || || || Linux 2.6.37 ||

| 2011–02 || Windows 7 Service Pack 1 || || || Debian 6.0 Android Honeycomb ||

| 2011–03 || Windows CE 7.0 || iOS 4.3 || || Linux 2.6.38 openSUSE 11.4 || ReactOS 0.3.13

| 2011–04 || Windows Home Server 2011 || || DragonFly BSD 2.10 || Ubuntu 11.04 Slackware 13.37||

| 2011–05 || || || OpenBSD 4.9 || Linux 2.6.39 Fedora Linux 15 Android 3.1 || AmigaOS 4.1 Upd. 1 (for Classic) eComStation 2.1

| 2011–06 || || iOS 5 || || ChromeOS (first shipped) || 9front

| 2011–07 || || Mac OS X Lion (v10.7) || || Linux 3.0 Android 3.2 HP webOS 3 || AmigaOS 4.1 Upd. 3

| 2011–08 || || || || ||

| 2011–09 ||Windows Phone 7.5|| || || ||

| 2011–10 || || || || Linux 3.1 Ubuntu 11.10 Android Ice Cream Sandwich ||

| 2011–11 || || || OpenBSD 5.0 || Fedora Linux 16 openSUSE 12.1 || Solaris 11 11/11

| 2011–12 || || || || ||AmigaOS 4.1 Upd. 4

| 2012–01 || || || FreeBSD 9.0 || Linux 3.2 || FreeDOS 1.1

| 2012–02 || || || DragonFly BSD 3.0 || || ReactOS 0.3.14 Minix 3.2

| 2012–03 || || iOS 5.1 || || Linux 3.3 Android 4.0.4||

| 2012–04 || || || || Ubuntu 12.04 (LTS) || Tizen 1.0

| 2012–05 || || || OpenBSD 5.1 || Linux 3.4 Fedora Linux 17 || DexOS

| 2012–06 || || || || || BS2000/OSD 9.0 MorphOS 3.0

| 2012–07 || || OS X Mountain Lion (v10.8) || || Linux 3.5 Android Jelly Bean openSUSE 12.2 || MorphOS 3.1 AmigaOS 4.1 Upd. 5

| 2012–08 || || || || ||

| 2012–09 || Windows Server 2012 || iOS 6 || || Linux 3.6 Slackware 14.0 Qubes OS||

| 2012–10 || Windows 8 Windows Phone 8 || || NetBSD 6.0 OpenBSD 5.2 || Ubuntu 12.10 || Solaris 11.1

| 2012–11 || || || DragonFly BSD 3.2 || Android 4.2 || Haiku R1 Alpha 4

| 2012–12 || || || FreeBSD 9.1 || ||

| 2013–01 || || iOS 6.1 || || Fedora Linux 18 || BlackBerry 10 Solaris 10 1/13

| 2013–02 || Windows Phone 7.8 || || || || Tizen 2.0

| 2013–03 || || || || openSUSE 12.3 ||

| 2013–04 || || || DragonFly BSD 3.4 || Linux 3.9 Ubuntu 13.04 ||

| 2013–05 || || || NetBSD 6.1 OpenBSD 5.3 || Debian 7.0 || ReactOS 0.3.15 MorphOS 3.2

| 2013–06 || Windows CE 8.0 (2013) || || || Linux 3.10 ||

| 2013–07 || || || || Fedora Linux 19 Android 4.3 ||

| 2013–08 || || || || ||

| 2013–09 || || iOS 7 || FreeBSD 9.2 || Linux 3.11 || MorphOS 3.3 z/OS Version 2.1

| 2013–10 || Windows 8.1 Windows Server 2012 R2 || OS X Mavericks (v10.9) || || Ubuntu 13.10 ||

| 2013–11 || Xbox One || || DragonFly BSD 3.6 OpenBSD 5.4 || Slackware 14.1 openSUSE 13.1 Android KitKat Linux 3.12 || PlayStation 4

| 2013–12 || || || || Fedora Linux 20 || MorphOS 3.4 Muen separation kernel

| 2014–01 || || || FreeBSD 10.0 || Linux 3.13 ||

| 2014–02 || || || || || ReactOS 0.3.16 MorphOS 3.5

| 2014–03 || || iOS 7.1 || || Linux 3.14 ||

| 2014–04 ||Windows Phone 8.1|| || || Ubuntu 14.04 (LTS) || Solaris 11.2

| 2014–05 || || || OpenBSD 5.5 || ||

| 2014–06 || || || DragonFly BSD 3.8 || Linux 3.15 Red Hat Enterprise Linux 7|| MorphOS 3.6

| 2014–07 || || || || ||

| 2014–08 || || || || Linux 3.16 || MorphOS 3.7

| 2014–09 || || iOS 8 || || || Minix 3.3

| 2014–10 || || OS X Yosemite (v10.10) iOS 8.1 || ||Ubuntu 14.10 Linux 3.17 ||

| 2014–11 || || || OpenBSD 5.6 FreeBSD 10.1 DragonFly BSD 4.0 || openSUSE 13.2 Android Lollipop Android TV Lollipop || IBM i 7.2 ReactOS 0.3.17

| 2014–12 || || || || Linux 3.18 Fedora Linux 21 ||

| 2015–01 || || || || ||

| 2015–02 || || || || Linux 3.19 ||

| 2015–03 || || iOS 8.2 || || ||

| 2015–04 || || iOS 8.3 watchOS 1 || || Linux 4.0 Debian 8.0 Ubuntu 15.04 || Redox OS

| 2015–05 || || || || Fedora Linux 22 || BS2000/OSD 10.0

| 2015–06 || || iOS 8.4 || || Linux 4.1 || MorphOS 3.9

| 2015–07 || Windows 10 (1507) || || || ||

| 2015–08 || || || |FreeBSD 10.2 || Linux 4.2 ||

| 2015–09 || || OS X El Capitan (v10.11) iOS 9 watchOS 2 || NetBSD 7.0 || || z/OS Version 2.2

| 2015–10 || || iOS 9.1 tvOS9 || || Android Marshmallow Android TV Marshmallow Ubuntu 15.10 ||AIX 7.2 Solaris 11.3

| 2015–11 || Windows 10 November Update (1511) Windows 10 Mobile (1511)|| tvOS9.1 || || Linux 4.3 Fedora Linux 23 openSUSE Leap 42.1 ||

| 2015–12 || || iOS 9.2 watchOS 2.1 tvOS9.2 || || ||

| 2016–01 || || || || Linux 4.4 || Minix 3.4

| 2016–02 || || || || ||ReactOS 0.4

| 2016–03 || || iOS 9.3 watchOS 2.2 tvOS9.3 || OpenBSD 5.9 FreeBSD 10.3 || Linux 4.5 ||

| 2016–04 || || || || Ubuntu 16.04 || IBM i 7.3 ReactOS 0.4.1

| 2016–05 || || || ||Linux 4.6||

| 2016–06 || || || || Slackware 14.2 Fedora Linux 24 Linux Mint 18 ||

| 2016–07 || || || || Linux 4.7 ||

| 2016–08 || Windows 10 Anniversary Update (1607) Windows 10 Mobile Anniversary Update (1607) || || DragonFly BSD 4.6 || Android Nougat Android TV Nougat || ReactOS 0.4.2

| 2016–09 || Windows Server 2016 (1607) || macOS Sierra (v10.12) iOS 10 watchOS 3 tvOS10 || OpenBSD 6.0 || Linux 4.8||

| 2016–10 || || iOS 10.1 watchOS 3.1 ||NetBSD 7.0.2 FreeBSD 11.0 ||Android 7.1 Ubuntu 16.10 ||

| 2016–11 || || || || Oracle Linux 7.3 Fedora Linux 25 openSUSE Leap 42.2 || ReactOS 0.4.3

| 2016–12 || || iOS 10.2 tvOS10.1 || || Linux 4.9 Linux Mint 18.1 || FreeDOS 1.2

| 2017–01 || || || || || Tizen 3.0

| 2017–02 || || || || Linux 4.10 || ReactOS 0.4.4

| 2017–03 || || iOS 10.3 watchOS 3.2 tvOS10.2 || DragonFly BSD 4.8 NetBSD 7.1 || ||

| 2017–04 || Windows 10 Creators Update (1703) Windows 10 Mobile Creators Update (1703) || || OpenBSD 6.1 || Linux 4.11 Ubuntu 17.04 ||

| 2017–05 || || || || || ReactOS 0.4.5 ArcaOS 5.0.0 Tizen 4.0

| 2017–06 || || || || Debian 9.0 Fedora Linux 26

| 2017–07 || || || || Linux 4.12 openSUSE Leap 42.3 || BS2000/OSD 11.0 ArcaOS 5.0.1

| 2017–08 || || || || Android Oreo Android TV Oreo ||

| 2017–09 || || macOS High Sierra (v10.13) iOS 11 watchOS 4 tvOS11 || || Linux 4.13 || ReactOS 0.4.6

| 2017–10 || Windows 10 Fall Creators Update (1709) Windows 10 Mobile Fall Creators Update (1709) Windows Server 2016 Fall Creators Update (1709) || iOS 11.1 watchOS 4.1 tvOS11.1 || OpenBSD 6.2 DragonFly BSD 5.0 || Ubuntu 17.10 ||

| 2017–11 || || || || Linux 4.14 Fedora Linux 27 || BareMetal 1.0.0

| 2017–12 || || iOS 11.2 watchOS 4.2 tvOS11.2 || || Android 8.1 || ReactOS 0.4.7

| 2018–01 || || || || Linux 4.15 ||

| 2018–02 || || || || || ArcaOS 5.0.2

| 2018–03 || || iOS 11.3 watchOS 4.3 tvOS11.3 || NetBSD 7.1.2 || || Genode Sculpt EA

| 2018–04 || Windows 10 April 2018 Update (1803) || || OpenBSD 6.3 DragonFly BSD 5.2 || Linux 4.16 Ubuntu 18.04 (LTS) || ReactOS 0.4.8

| 2018–05 || || iOS 11.4 tvOS11.4 || ||Fedora Linux 28 openSUSE Leap 15.0 || Tizen 5.0

| 2018–06 || || || || Linux 4.17 || Genode Sculpt TC

| 2018–07 || || || NetBSD 8.0 || SUSE Linux Enterprise 15 || ReactOS 0.4.9

| 2018–08 || || || NetBSD 7.2 || Linux 4.18 Android Pie Android TV Pie || ArcaOS 5.0.3 Solaris 11.4

| 2018–09 || || macOS Mojave (v10.14) iOS 12 watchOS 5 tvOS12 || || || Genode Sculpt VC

| 2018–10

| Windows 10 October 2018 Update (1809) Windows Server 2019 (1809)

| iOS 12.1 watchOS 5.1 tvOS12.1

| OpenBSD 6.4

| Linux 4.19 Ubuntu 18.10 Fedora Linux 29

| SerenityOS

| 2018–11

| ReactOS 0.4.10

| 2018–12

| DragonFly BSD 5.4 FreeBSD 12.0

| Linux 4.20

| One UI 1.0

| 2019–01

| 2019–02

| 2019–03

| iOS 12.2 watchOS 5.2 tvOS12.2

| Linux 5.0

| ReactOS 0.4.11 One UI 1.1

| 2019–04

| Ubuntu 19.04 Fedora Linux 30

| 2019–05

| Windows 10 May 2019 Update (1903)

| iOS 12.3 tvOS12.3

| OpenBSD 6.5

NetBSD 8.1

| Linux 5.1 Red Hat Enterprise Linux 8 openSUSE Leap 15.1

| 2019–06

| DragonFly BSD 5.6

| SUSE Linux Enterprise 15 SP1

| IBM i 7.4

| 2019–07

| iOS 12.4 watchOS 5.3 tvOS12.4

| Debian 10.0 Linux 5.2

| ArcaOS 5.0.4

| 2019–08

| 2019–09

| iOS 13 iOS 13.1 iPadOS 13.1 watchOS 6 tvOS13

| Linux 5.3 Android 10

| ReactOS 0.4.12

| 2019–10

| iOS 13.2 iPadOS 13.2 watchOS 6.1 macOS Catalina (v10.15)

|OpenBSD 6.6

| Ubuntu 19.10 Fedora Linux 31

| 2019–11

| Windows 10 November 2019 Update (1909)

|FreeBSD 12.1

|Linux 5.4

| One UI 2.0

| 2019–12

| iOS 13.3 iPadOS 13.3

| Android TV 10

2020s

{| class="wikitable sortable"

! Year–month || Microsoft || Apple || BSD || Linux || Others

| 2020–01

| Linux 5.5

| 2020–02

| NetBSD 9.0

| 2020–03

| iOS 13.4 iPadOS 13.4 watchOS 6.2 tvOS13.4

| DragonFly BSD 5.8

| Linux 5.6

| 2020–04

| Ubuntu 20.04 Fedora Linux 32

| ReactOS 0.4.13

| 2020–05

| Windows 10 May 2020 Update (2004) Windows 10X

| iOS 13.5 iPadOS 13.5

| OpenBSD 6.7

| OpenVMS 9.0

Tizen 6.0

| 2020–06

| Linux 5.7

| ArcaOS 5.0.5 Haiku R1/beta2

| 2020–07

| iOS 13.6 iPadOS 13.6

| 2020–08

| Linux 5.8

| ArcaOS 5.0.6

One UI 2.5

| 2020–09

| iOS 13.7 iPadOS 13.7 iOS 14 iPadOS 14.0 watchOS 7.0 tvOS14.0

| Android 11

Android TV 11

| 2020–10

| Windows 10 October 2020 Update (20H2)

| iOS 14.1 iPadOS 14.1

| NetBSD 9.1 OpenBSD 6.8 FreeBSD 12.2

| Linux 5.9 Fedora Linux 33 Ubuntu 20.10

| 2020–11

| Xbox Series S

Xbox Series X

| macOS Big Sur (v11.0) iOS 14.2 iPadOS 14.2 watchOS 7.1 tvOS14.2

| PlayStation 5

| 2020–12

| macOS Big Sur (v11.1) iOS 12.5 iOS 14.3 iPadOS 14.3 watchOS 6.3 watchOS 7.2 tvOS14.3

| Linux 5.10

| One UI 3.0

| 2021–01

| iOS 14.4 iPadOS 14.4 watchOS 7.3 tvOS14.4

| 2021–02

| macOS Big Sur (v11.2)

| One UI 3.1

| 2021–03

| One UI 3.2

| 2021–04

| macOS Big Sur (v11.3) iOS 14.5 iPadOS 14.5 watchOS 7.4 tvOS14.5

| FreeBSD 13.0

| Fedora Linux 34

| 2021-05

| Windows 10 May 2021 Update (21H1)

| macOS Big Sur (v11.4) iOS 14.6 iPadOS 14.6 watchOS 7.5 tvOS14.6

| OpenBSD 6.9 DragonFly BSD 6.0 NetBSD 9.2

| Linux 5.12 Ubuntu 21.04

| 2021-06

| Rocky Linux 8 Linux 5.13

| One UI 3.5

| 2021-07

| macOS Big Sur (v11.5) iOS 14.7 iPadOS 14.7 watchOS 7.6 tvOS14.7

| Haiku R1/beta3

| 2021-08

| Windows Server 2022

| Linux 5.14 Debian 11.11

| 2021-09

| macOS Big Sur (v11.6) iOS 14.8 iPadOS 14.8 iOS 15 iPadOS 15.0 watchOS 8.0 tvOS15.0

| 2021-10

| Windows 11

| macOS Monterey (v12.0) iOS 15.1 iPadOS 15.1 watchOS 8.1 tvOS15.1

| OpenBSD 7.0

| Android 12 Ubuntu 21.10

| 2021-11

| Windows 10 November 2021 Update (21H2)

| Android TV 12

Fedora Linux 35

One UI 4.0

| 2021-12

| macOS Monterey (v12.2) iOS 15.2 iPadOS 15.2 watchOS 8.3 tvOS15.2

| ArcaOS 5.0.7 ReactOS 0.4.14

| 2022-01

| iOS 15.3 iPadOS 15.3 watchOS 8.4 tvOS15.3

| DragonFly BSD 6.2.1

| 2022-02

| Slackware 15.0

| One UI 4.1

| 2022-03

| macOS Monterey (v12.3) iOS 15.4 iPadOS 15.4 watchOS 8.5 tvOS15.4

| Android 12L

| 2022-04

| OpenBSD 7.1

| Ubuntu 22.04

| 2022-05

| macOS Monterey (v12.4) iOS 15.5 iPadOS 15.5 watchOS 8.6 tvOS15.5

| Fedora Linux 36

| IBM i 7.5

Tizen 7.0

| 2022-06

| Rocky Linux 9

| 2022-07

| macOS Monterey (v12.5) iOS 15.6 iPadOS 15.6 watchOS 8.7 tvOS15.6

| One UI 4.5

| 2022-08

| Android 13

| 2022-09

| Windows 11 2022 Update (22H2)

| macOS Big Sur (v11.7) macOS Monterey (v12.6) iOS 15.7 iPadOS 15.7 iOS 16 watchOS 9.0 tvOS16.0

| 2022-10

| Windows 10 2022 Update (22H2)

| macOS Ventura (13.0) iOS 16.1 iPadOS 16.0

| OpenBSD 7.2

| Ubuntu 22.10

| One UI 5.0

| 2022-11

| macOS Ventura (13.0.1) iOS 16.1.1

| Fedora Linux 37

| 2022-12

| iOS 16.2

| DragonFly BSD 6.4

| Android TV 13

| Haiku R1/beta4

| 2023-01

| 2023-02

| One UI 5.1

| 2023-03

| 2023-04

|OpenBSD 7.3

|Fedora Linux 38 Ubuntu 23.04

| 2023-05

| Tizen 8.0

| 2023-06

| Debian 12.12

| 2023-07

| 2023-08

| Linux 6.5

| ArcaOS 5.1.0 HarmonyOS NEXT beta

| 2023-09

| macOS Sonoma (14.0) iOS 17.0 iPadOS 17.0

| 2023-10

| Windows 11 2023 Update (23H2)

| OpenBSD 7.4

| Android 14

Ubuntu 23.10

| One UI 6.0

| 2023-11

|FreeBSD 14.0

|Fedora Linux 39

| 2023-12

|2024-01

| One UI 6.1

|2024-02

|2024-03

|NetBSD 10.0

|2024-04

|OpenBSD 7.5

|Fedora Linux 40 Ubuntu 24.04

|2024-05

| Android TV 14

| Tizen 9.0

|2024-06

|2024-07

|2024-08

|2024-09

|macOS Sequoia

(15.0)

iOS 18.0

iPadOS 18

watchOS 11

tvOS 18

|Haiku R1/beta5

|2024-10

|Windows 11 2024 Update (24H2)

|iOS 18.1

|OpenBSD 7.6

|Android 15

Fedora Linux 41

Ubuntu 24.10

|2024-11

|Windows Server 2025

|Linux 6.12

|2024-12

|2025-01

|2025-02

|ArcaOS 5.1.1

|2025-03

|ReactOS 0.4.15

One UI 7.0

|2025-04

|DragonFly BSD 6.4.1

|Fedora Linux 42

Ubuntu 25.04

Android TV 15

|IBM i 7.6

|2025-05

|DragonFly BSD 6.4.2

OpenBSD 7.7

|2025-06

|Android 16

Android TV 16

Rocky Linux 10

|2025-07

| One UI 8.0

|2025-08

|Debian 13.1

|2025-09

|macOS Tahoe

(26.0)

iOS 26

iPadOS 26

watchOS 26

tvOS 26

|2025-10

|Windows 11 2025 Update (25H2)

|OpenBSD 7.8

|Fedora Linux 43

Ubuntu 25.10

|2025-11

| HarmonyOS 6

|2025-12

|FreeBSD 15.0

| 2026-01

| Windows 11 KB5077744

| iOS 26.2.1

iPadOS 26.2.1

| Android Open Source Project

Android 16 QPR2

CachyOS

| 2026-02

| Windows 11 26H1

| iOS 26.3

iPadOS 26.3

| Google Play System

| Genode OS Framework

| 2026-03

| iOS 26.3.1

iPadOS 26.3.1

| Android 16 QPR3

AerynOS

| 2026–04

| iOS 26.4.1

iPadOS 26.4.1

iOS 26.4.2

iPadOS 26.4.2

| Fedora Linux 44

Linux 7.0

Ubuntu 26.04

Android AOSP Baseline

ChromeOS Stable

| 2026-05

| iOS 26.5

iPadOS 26.5

macOS Tahoe 26.5

iOS 26.6 Beta 1

| Android 16 (Google Pixel Update)

Android 17

One UI 8.5

| 2026-06

| Windows 11 Secure Boot Migration

| macOS 27

iOS 27

iPadOS 27

watchOS 14

visionOS 4

| Android 17 (Stable OTA)

References

External links

A brief history of operating systems 1946-2010s
Bitsavers 1950s-1980s minicomputers and mainframes software and manuals captured, salvaged, and archived
Operating Systems: Timeline and Family Tree 1951-2026 (1400 OSs)
UNIX
UNIX History 1969-2025 and descendants
Microsoft
Concise Microsoft O.S. Timeline 1981–2020
Microsoft operating system time-line 1983-2007

20th Century

1940s

1950s

1960s

1970s

1980s

1990s

21st Century

2000s

2010s

2020s

See also

References

External links