1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 BSD/386 0.3.2 1992 1993 BSD/OS 1.1 1994 BSD/OS 2.0 1995 BSD/OS 2.0.1 BSD/OS 2.1 1996 BSD/OS 3.0 1997 BSD/OS 3.1 BSD/OS 4.0 1998 BSD/OS 4.0.1 1999 BSD/OS 4.1 2000 BSD/OS 4.2 2001 2002 2003 2004 2005 (BSDI) BSD/OS 1.0 BSD/OS 4.3 BSD/OS 4.3.1 BSD/OS 5.0 (BSDI) (BSDI) (BSDI) (BSDI) (BSDI) (BSDI) (BSDI) (BSDI) (BSDI) (BSDI) (BSDI) may 2, 2003 february 28, 1992 january 1995 march 1, 1999 february 14, 2002 december 21, 2002 NetBSD 2.0 RC1 NetBSD 2.0.2 UNIX Time-Sharing System february 14, 1994 august 1995 february 13, 1996 february 26, 1997 december 10, 1997 august 17, 1998 december 20, 1999 november 29, 2000 september 27, 2004 NetBSD 2.0 RC5 NetBSD 2.0 NetBSD 2.0.3 NetBSD 2.1 NetBSD 3.0 Seventh Edition Modified Ultrix-11 v3.0 Ultrix-11 v3.1 november 12, 2004 april 15, 2005 V7M 2.1 NetBSD 1.2.1 NetBSD NetBSD NetBSD 1.4.2 BSD/OS 5.0 Silver OS december 9, 2004 october 31, 2005 november 2, 2005 december 23, 2005 (V7M) Ultrix-11 1986 1986 Ultrix 4.2 Ultrix 4.2A Ultrix 4.3 Ultrix 4.3A Ultrix 4.4 Ultrix 4.5 1.3.1 1.3.2 NetBSD 1.3.3 NetBSD 1.4.1 NetBSD 1.4.3 FireFly BSD 1.0 october 1981 november 1995 may 20, 1997 december 23, 1998 august 26, 1999 march 19, 2000 november 25, 2000 beta NetBSD 1.6 beta july 10, 2004 december 1980 Acorn RISC iX RISC iX 1.21 march 9, may 29, NetBSD 1.6 NetBSD 1.6.1 NetBSD 1.6.2 september 2004 PC-BSD 0.7 PC-BSD 0.7.8 PC-BSD 0.8.3 PC-BSD 1.0rc1 PC-BSD 1.0rc2 PC-BSD 1.0 1989 1991 may 28, 2002 february 29, 2004 Ultrix 32M 2.0 BSD Net/2 NetBSD 1.3 1998 1998 NetBSD 1.5.2 sept. 14, 2002 april 14, 2003 may 18, 2005 july 18, 2005 october 23, 2005 november 10, 2005 january 20, 2006 april 28, 2006 Ultrix 32M 1.0 Ultrix 32M 1.2 BSD Net/1 NetBSD 0.8 NetBSD 0.9 NetBSD 1.0 NetBSD 1.1 NetBSD 1.2 NetBSD 1.4 NetBSD 1.5 NetBSD 1.5.1 NetBSD 1.5.3 1984 1985 1987 (4.3BSD Lite) january 4, july 11, 2001 september DragonFly BSD DragonFly BSD november 1988 april 20, 1993 august 23, 1993 october 26, 1994 november 26, 1995 october 4, 1996 may 12, 1999 december 6, 2000 july 22, 2002 DragonFly BSD (beta) 1.0-RC1 DragonFly DragonFly DragonFly BSD 1.2.0 DragonFly BSD 1.4 june 1991 1998 14, 2001 july 16, 2003 BSD 1.0 BSD 1.0A FreeBSD FreeBSD 3.0 march 5, 2004 june 28, 2004 march 8, 2005 january 8, 2006 mt Xinu mt Xinu FreeBSD 1.1 FreeBSD 1.1.5.1 FreeBSD FreeBSD 3.4 FreeBSD 4.6 FreeBSD 4.8 FreeBSD 4.9 july 12, 2004 july 15, 2004 FreeBSD 4.11 mt Xinu more/BSD mt Xinu mt Xinu FreeBSD 1.0 FreeBSD 2.0 2.0.5 2.1 FreeBSD 2.2 october 16, 1998 FreeBSD 3.1 FreeBSD 3.2 FreeBSD 3.3 FreeBSD 3.5 FreeBSD 4.2 FreeBSD 4.3 FreeBSD 4.4 FreeBSD 4.5 FreeBSD 4.6.2 FreeBSD 4.7 FreeBSD 4.10 (4.2BSD) (4.3BSD) mach386 may 1994 july 1994 december 20, 1999 june 24, 2000 april 22, 2001 june 15, 2002 august 15, 2002 october 10, 2002 april 3, 2003 october 28, 2003 january 25, 2005 july 19, 1983 december 1988 mach 2.6 december 1993 november 22, 1994 june 10, 1995 november 19, 1995 march 16, 1997 4.3BSD-Quasijarus0 february 15, 1999 may 18, 1999 september 17, 1999 november 21, 2000 september 19, 2001 january 29, 2002 4.3BSD-Quasijarus0b 4.3BSD-Quasijarus0c may 27, 2004 Triance OS 4.3BSD-Quasijarus0a FreeBSD 6 FreeBSD 6 FreeBSD 6.1 december 27, 1998 december 7, 2003 february 15, 2004 1.0-BETA BETA 3 FreeBSD 6.0 386 BSD 0.0 386 BSD 0.1 386 BSD 1.0 FreeBSD 2.1.5 FreeBSD 2.1.6 FreeBSD 2.1.7 FreeBSD 2.2.1 FreeBSD 2.2.5 FreeBSD 2.2.7 october 10, 1999 FreeBSD 4.1 FreeBSD 4.1.1 MicroBSD 0.1 MicroBSD 0.5 MicroBSD 0.6 MicroBSD 0.7 beta (announced) may 8, 2006 july 14, 1996 FreeBSD 2.2.8 FreeBSD 4.0 july 27, 2000 august 23, 2004 july 2, 2005 august 29, 2005 november 4, 2005 february 1992 july 14, 1992 12 november 1994 2.11BSD november 16, 1996 february 20, 1997 march 25, 1997 october 22, 1997 july 22, 1998 2.11BSD march 14, 2000 september 27, 2000 july 14, 2002 august 14, 2002 october 12, 2002 october 27, 2003 ekkoBSD 1.0 BETA1B ekkoBSD BETA 2 1BSD 2BSD 2.79BSD 2.8BSD 2.8.1BSD 2.8.2BSD 2.9BSD 2.9.1BSD 2.9BSD-Seismo 2.10BSD 2.10.1BSD 2.11BSD 2.11BSD 2.11BSD november 29, 1998 2.11BSD patch 444 ekkoBSD 1.0 BETA 2 2.11BSD patch 100 2.11BSD patch 300 patch 430 2.11BSD patch 433 ekkoBSD november 25, 2003 february 18, 2004 march 9, 1978 may 10, 1979 april 1980 july 1981 january 1982 september 8, 1982 july 1983 november 1983 august 1985 april 1987 january 1989 patch 366 patch 400 FreeBSD 5.0 beta FreeBSD 5.0 FreeBSD 5.0 february 10, 2003 FreeBSD 5.1 august 6, 2003 july 7, 2004 february 1992 january 1993 patch 200 february 1996 january 1998 december 13, 1999 november 5, 2000 FreeBSD 5.0 DP 2 FreeBSD 5.2-BETA FreeBSD 5.2-RC1 FreeBSD 5.2 FreeBSD 5.2.1 FreeBSD 5.3-BETA1 FreeBSD 5.3 FreeBSD 5.4 FreeBSD 5.5 december 1994 february 1997 march 2000 Developer Preview 1 november 18, 2002 january 19, 2003 june 9, 2003 november 26, 2003 december 10, 2003 january 12, 2004 august 22, 2004 may 9, 2005 may 25, 2006 4.4BSD Lite 1 4.4BSD Lite 2 april 8, 2002 MirBSD #6 MirBSD #7semel MirBSD #7bis february 25, 2004 MirBSD #7quater MirBSD #8-beta november 6, 2004 MIPS OS MIPS OS MIPS OS 4.4BSD Lite 2 TrustedBSD (announced) TrustedBSD beta MirBSD MirBSD #0 MirBSD #1 MirBSD #2 MirBSD #3 MirBSD #4 MirBSD #5 MirBSD #7ter MirBSD #8 march 1, 1994 june 1995 OpenBSD 3.0 april 16, 2003 july 8, 2003 september 28, 2003 october 4, 2003 june 14, 2004 october 16, 2004 RISC/os RISC/os 4 RISC/os 5 april 9, 2000 OpenBSD 3.1 august 29, 2002 october 11, 2002 november 31, 2002 january 28, 2003 march 2, 2003 june 11, 2003 november 22, 2003 OpenBSD 3.5 OpenBSD 3.7 december 23, 2005 OpenBSD 3.9 OpenBSD OpenBSD 2.0 OpenBSD 2.1 OpenBSD 2.2 OpenBSD 2.3 OpenBSD 2.4 OpenBSD 2.5 OpenBSD 2.6 OpenBSD 2.7 OpenBSD 2.8 OpenBSD 2.9 november OpenBSD 3.2 OpenBSD 3.3 OpenBSD 3.4 beta OpenBSD 3.4 OpenBSD 3.6 OpenBSD 3.8 4.3BSD Tahoe 4.4BSD 4.4BSD Encumbered october 1995 october 1996 june 1, 1997 december 1, 1997 may 19, 1998 december 1, 1998 may 19, 1999 december 1, 1999 december 1, 2000 june 1, 2001 may 19, 2002 november 1, 2002 may 1, 2003 august 11, 2003 november 1, 2003 may 1, 2004 GNU-Darwin GNU-Darwin may 19, 2005 november 1, 2005 may 1, 2006 3BSD 4.0BSD 4.1BSD 4.1aBSD 4.1bBSD 4.1cBSD 4.2BSD 4.3BSD 4.3BSD Reno 4.4BSD alpha ArchBSD june 15, 2000 GNU-Darwin 27, 2001 GNU-Darwin (beta 2.5) GNU-Darwin 1.0 GNU-Darwin 1.1 october 29, 2004 april 1982 june 1988 june 1990 june 1, 1993 june 1993 january 17, 2001 march 12, 2002 1.1 rc1 1.1 rc2 march 1980 october 1980 june 1981 august 1982 december 1982 september 1983 june 1986 HPBSD june 1992 november 1994 QNX RTOS 6.1.0 QNX RTOS 6.1.0 QNX 6.2 january 10, 2003 QNX 6.2.1 (Momentics) october 8, 2003 HPBSD 1.0 HPBSD 2.0 HPBSD QNX/Neutrino 1.0 QNX/Neutrino 2.0 QNX/Neutrino 2.10 QNX RTOS 6 QNX 6.2 (patch A) QNX 6.3 august 17, 2004 september 29, 2004 1987 1996 1998 (QRTP) july 6, 2001 patch A (Momentics) october 18, 2002 february 18, 2003 june 3, 2004 QUNIX QNX beta QNX 1.0 april 1988 QNX 4.0 april 1993 QNX 4.1 xMach DR 01 january 18, 2001 xMach current september 28, 2001 OpenDarwin OpenDarwin 7.2.1 QNX 2.0 QNX 2.21 QNX 4.2 QNX 4.22 QNX 4.24 QNX 4.25 xMach june 4, 2002 OpenDarwin-20030212 6.6.1 UCLA Secure Unix 1981 1983 1984 1990 1994 august 6, 2000 march 16, 2001 february 17, 2003 july 16, 2004 IBM AOS AOS Reno AOS Lite Darwin 0.1 Darwin 0.2 Darwin 1.0 Darwin 1.1 Darwin 1.2.1 Darwin 1.3.1 Darwin 1.4.1 Darwin Darwin 6.0.1 Darwin 6.0.2 Darwin Darwin 6.5 Darwin 6.6 may 27, 2003 Darwin 6.7 Darwin 6.8 Darwin 8.0b1 Darwin 8.0.1 Darwin 8.1 Darwin 8.2 Darwin 8.3 Darwin 8.4 Darwin 8.5 Darwin 8.6 1979 1992 Darwin 0.3 Darwin 5.1 Darwin 5.3 Darwin 5.4 Darwin 5.5 Darwin 6.2 Darwin 6.3 Darwin 6.4 The Wollongong Group Eunice 2 Eunice 4.2 1988 1995 march 16, 1999 may 13, 1999 august 16, 1999 april 5, 2000 may 15, 2000 november 15, 2000 april 13, 2001 october 1, 2001 5.2 sept. 23, 2002 oct. 28, 2002 6.1 april 15, 2003 may 14, 2003 sept. 22, 2003 sept. 22, 2003 Darwin 7.4 september 2004 april 29, 2005 may 16, 2005 july 12, 2005 october 31, 2005 jan. 10, 2006 february 15, 2006 april 10, 2006 Eunice 4.3 Lites 1.0 Lites 1.1 Lites 1.1u3 Darwin 7.0 Preview Darwin 7.0 Darwin 7.0.1 Darwin Darwin 7.2 Darwin 7.3 Darwin 7.5 Darwin 7.6 Darwin 7.7 Darwin 7.8 Darwin 7.9 SRI Eunice Eunice (Edition 7) 1982 1985 SunOS 4.1.1 SunOS 4.1.3 SunOS 4.1.3_U1b SunOS 4.1.4 Lites Lites Mac OS X Mac OS X june 25, 2003 7.1 march 15, 2004 may 26, 2004 1987 SunOS 4.1.2 SunOS 4.1.3_U1 february 28, 1995 march 24, 1995 march 30, 1996 Mac OS X (DP1) Mac OS X 10.0 Mac OS X 10.0.4 Mac OS X 10.1 Mac OS X Mac OS X Mac OS X 10.1.4 Mac OS X 10.2 Mac OS X Mac OS X Mac OS X october 24, 2003 november 14, 2003 december 19, 2003 august 10, 2004 november 6, 2004 december 15, 2004 february 9, 2005 april 15, 2005 Mac OS X 10.4 Mac OS X Mac OS X Mac OS X Mac OS X Mac OS X 1980 SunOS 1.0 SunOS 1.1 SunOS 1.2 SunOS 3.0 SunOS 3.2 SunOS 3.5 SunOS 4.0 SunOS 4.0.3 SunOS 4.1 (Solaris 1) (Solaris 1.1a) (Solaris 1.1.1) (Solaris 1.1.1B) (Solaris 1.1.2) Mac OS X (DP2) Mac OS X (DP3) Mac OS X (DP4) Mac OS X (beta) Mac OS X 10.1.3 Mac OS X Mac OS X 10.2.2 Mac OS X 10.2.3 Mac OS X 10.2.4 10.2.5 10.2.6 Mac OS X 10.4 (Tiger beta) Mac OS X 10.4 (Tiger beta 2) Mac OS X 10.4.1 SunOS 2.0 (Solaris 1.0.1) may 10, 1999 may 15, 2000 (Cheetah) june 22, 2001 (Puma) 10.1.1 10.1.2 april 17, 2002 (Jaguar) 10.2.1 10.2.7 10.2.8 october 30, 2004 april 29, 2005 may 16, 2005 10.4.2 10.4.3 10.4.4 10.4.5 10.4.6 february 1982 april 1984 january 1985 february 17, september 1986 1988 1989 may 1989 march 1990 november 1990 august 1992 december 1993 february 1994 september 1994 november 10, 1999 february 14, 2000 september 13, 2000 february 19, 2002 10.1.5 november 11, 2002 december 19, 2002 february 13, 2003 april 10, 2003 may 6, 2003 Mac OS X 10.3.4 june 28, 2004 Mac OS X 10.3.5 Mac OS X 10.3.8 may 15, 1985 december 1991 march 24, 2001 sept. 29, 2001 nov 13, 2001 dec 20, 2001 june 4, 2002 august 13, 2002 sept. 18, 2002 Mac OS X 10.3 beta (Panther) august 18, 2003 september 22, 2003 Mac OS X 10.3 Mac OS X 10.3.1 Mac OS X 10.3.2 Mac OS X 10.3.3 Mac OS X 10.3.7 Mac OS X 10.3.9 july 12, 2005 october 31, 2005 january 10, 2006 february 15, 2006 april 3, 2006 1986 Solaris 2.6 may 26, 2004 august 9, 2004 Mac OS X 10.3.6 february 9, 2005 UNSW 81 Solaris 2.0 (sparc) Solaris 2.1 Solaris 2.2 (sparc) Solaris 2.3 (sparc) Solaris 2.4 Solaris 2.5 Solaris 2.5.1 Solaris 7 Solaris 7, 3/99 Solaris 8 Solaris 8 Solaris 8 7/01 june 23, 2003 october 24, 2003 november 10, 2003 december 17, 2003 march 15, 2004 november 5, 2004 december 15, 2004 april 15, 2005 UNSW 01 UNSW 04 (SunOS 5.3) (SunOS 5.5) (SunOS 5.6) (SunOS 5.7) Solaris 7, 5/99 Solaris 7, 8/99 Solaris 7, 11/99 Solaris 8 Solaris 8 10/00 (su2) Solaris 8 1/01 (su3) Solaris 8 4/01 Solaris 8 10/01 Solaris 8 2/02 Solaris 8 12/02 UNSW april 1981 (SunOS 5.0) (SunOS 5.1) (SunOS 5.2) (SunOS 5.4) (SunOS 5.5.1) march 1999 august 1999 (beta) 6/00 (su1) may 2001 july 2001 october 2001 Mac OS X 10.3.4 january 1978 november 1979 november 1993 november 1995 august 1997 october 27, 1998 may 1999 november 1999 january 26, 2000 october 2000 february 20, 2001 february 2002 december 2002 Mac OS X 10.3 Mac OS X 10.3.1 Mac OS X 10.3.2 Server Mac OS X 10.3.3 Server Mac OS X 10.3.5 Mac OS X 10.3.6 Server Mac OS X 10.3.7 Mac OS X 10.3.8 july 1992 december 1992 may 1993 december 1994 may 1996 nov 2, 1999 june 2000 Mac OS X Server 10.3 beta (Panther) Server Server Mac OS X 10.3.9 Server BRL Unix BRL Unix Mac OS X Mac OS X Server Mac OS X Mac OS X Mac OS X Server Mac OS X Server Server Server december 19, 2003 march 15, 2004 november 5, 2004 Server Server april 15, 2005 Mac OS X 10.4.2 Mac OS X 10.4.5 Mac OS X 10.4.6 Mini Unix BRL Unix V4.1 Rhapsody DR2 Mac OS X Server 1.0 Mac OS X Server 1.0.2 Mac OS X Server 1.2 Mac OS X Server 1.2v3 Mac OS X Server Mac OS X Server Mac OS X Mac OS X Server Mac OS X Server Mac OS X Server Mac OS X Server Mac OS X Server Mac OS X Server june 23, 2003 Mac OS X Server may 26, 2004 Mac OS X 10.4 Server august 9, 2004 Mac OS X 10.4 Server Mac OS X 10.4.1 Server Mac OS X 10.4.3 Mac OS X 10.4.4 (4.2BSD) (4.3BSD) NeXTSTEP 0.8 NeXTSTEP 1.0 NeXTSTEP 2.0 NeXTSTEP 2.1 NeXTSTEP 3.0 NeXTSTEP 3.1 NeXTSTEP 3.2 NeXTSTEP 3.3 OPENSTEP 4.0 OPENSTEP 4.1 OPENSTEP 4.2 Rhapsody DR1 Server 10.1.1 10.1.5 Server 10.2 Server 10.2.1 10.2.4 10.2.5 10.2.6 october 24, 2003 november 10, 2003 december 15, 2004 february 9, 2005 Server Server Server Server may 1977 july 1979 sept. 18, 1990 october 1993 february 1995 january 1997 may, 1998 march 16, 1999 july 22, 1999 january 14, 2000 october 27, 2000 10.0.3 10.0.4 Server 10.1 10.1.2 10.1.3 10.1.4 10.2.2 10.2.3 10.2.8 (Tiger beta) april 29, 2005 may 19, 2005 Server 1985 1986 october 12, 1988 september 18, 1989 march 25, 1991 september 1992 may 25, 1993 july 22, 1996 december 1996 september, 1997 july 3, 2001 september 29, 2001 november january 17, 2002 february 20, 2002 april 15, 2002 july 1, 2002 august 13, 2002 sept. 18, 2002 february 24, 2003 april 14, 2003 may 8, 2003 july 12, 2005 october 31, 2005 february 15, 2006 april 3, 2006 UNIX 32V V7appenda Solaris 2.0 (x86) may 21, 2001 21, 2001 november 11, 2002 december 19, 2002 september 22, 2003 june 28, 2004 january 10, 2006 may 1979 Tunis Plurix Solaris 2.1 (x86) Mach 4 Mach 4 february 12, 1980 Mach end 1992 Mach 4 Mach 4 Trusted Solaris 2.5.1 Solaris 9 OE Solaris 9 OE 9/02 Solaris 9 OE 12/02 Solaris 9 x86 PE Solaris 9 OE 4/03 Solaris 9 OE 8/03 Solaris 9 OE 12/03 Solaris 9 OE 4/04 Solaris 9 OE 9/04 Solaris 9 OE 9/05 LSX 1981 1982 Mach 2.0 Mach 2.5 Mach 2.6 Mach 3 UK02 UK02p21 UK22 Trusted Solaris 7 Trusted Solaris 8 Solaris 9 alpha Solaris 9 EA may 22, 2002 july 29, 2003 august 16, 2004 1985 1988 1998 september 1998 sept. 2002 december 2002 february 6, 2003 april 2003 december 2003 april 1, 2004 september 3, 2005 july 20, 1994 november 3, 1995 march 29, 1996 november 2, 1999 november 20, 2000 october 2, 2001 Solaris 10 Solaris 10 Solaris 10 1/06 Yamit (alpha) Solaris 10 Preview (announced) UNIX Time-Sharing System UNIX Time-Sharing System UNIX Time-Sharing System UNIX Time-Sharing System UNIX Time-Sharing System UNIX Time-Sharing System UNIX Time-Sharing System UNIX Time-Sharing System Digital Unix january 31, 2005 january 25, 2006 UNIX Time-Sharing System UNIX Time-Sharing System OSF/1 Digital Unix Digital Unix 4.0 Digital Unix Digital Unix 4.0D Tru64 Unix V4.0F Tru64 Unix V5.0 Tru64 Unix V4.0G Tru64 Unix V5.1 Tru64 Unix V5.1A may 5, 2002 Tru64 Unix V5.1B july 29, 2003 Tru64 Unix V5.1B-1 november 15, 2004 UNICS First Edition (V1) Second Edition (V2) Third Edition (V3) Fourth Edition (V4) Fifth Edition (V5) Sixth Edition (V6) Seventh Edition (V7) Eighth Edition (V8) Ninth Edition (V9) Tenth Edition (V10) OSF/1 OSF/1.3 (DEC OSF/1 V4) 4.0A 4.0B OpenSolaris 1990 1992 june 1994 (DEC OSF/1 AXP) december 1997 february 1, 1999 august 12, 1999 may 2000 august 2000 september 2001 january 20, 2003 october 20, 2003 Solaris 11 beta september 1969 november 3, 1971 june 12, 1972 february 1973 november 1973 june 1974 may 1975 january 1979 february 1985 september 1986 Sinix 2.0 Sinix 2.1 october 1989 Sinix 5.20 Sinix 5.40 Sinix 5.41 Sinix ReliantUnix 5.43 may 1996 september 1996 december 1996 ReliantUnix 5.44 ReliantUnix 5.45 Unicos/mp 1.0 Unicos/mp 2.0 Unicos/mp 2.1 Unicos/mp 2.2 Unicos/mp 2.3 Unicos/mp 2.4 Unicos/mp 2.5 (announced) Sinix Sinix 5.42 march 1995 november 2003 Unicos/mp 3.0 Nevada build 23 1987 1988 1990 1992 1993 1995 1997 IRIX 6.5.1M IRIX 6.5.2 2000 IRIX 6.5.16 august 2002 december 2002 march 2003 july 2003 IRIX 6.5.23 march 2004 november 2004 march 2005 june 14, 2005 IRIX 5.0 IRIX 6.0 IRIX 6.2 IRIX 6.5 IRIX 6.5.7 IRIX 6.5.8 IRIX 6.5.9 IRIX 6.5.10 IRIX 6.5.12 IRIX 6.5.13 IRIX 6.5.14 IRIX 6.5.18 IRIX 6.5.19 IRIX 6.5.20 IRIX 6.5.21 IRIX 6.5.25 IRIX 6.5.28 october 18, 2005 IRIX IRIX 2.0 IRIX 3.0 IRIX 4.0 IRIX 6.3 IRIX 6.4 june 15, 1998 august 14, 1998 november 17, 1998 IRIX 6.5.3 IRIX 6.5.4 IRIX 6.5.5 IRIX 6.5.6 IRIX 6.5.11 IRIX 6.5.15 may 8, 2002 IRIX 6.5.17 IRIX 6.5.22 february 4, 2004 IRIX 6.5.24 IRIX 6.5.26 IRIX 6.5.27 1982 march 1993 december 1994 march 1996 november 1996 february 10, 2000 may 22, 2000 august 9, 2000 november 8, 2000 may 9, 2001 august 8, 2001 november 7, 2001 november 8, 2002 february 5, 2003 may 7, 2003 august 6, 2003 august 4, 2004 august 3, 2005 NonStop-UX november 18, 1987 june 10, 1988 NonStop-UX B00 september 1991 NonStop-UX B32 september 1996 NonStop-UX C40 NonStop-UX C41 NonStop-UX C50 february 9, 1999 may 11, 1999 august 6, 1999 november 10, 1999 february 2, 2001 february 6, 2002 august 7, 2002 NonStop-UX C61 november 5, 2003 NonStop-UX C63 may 5, 2004 november 3, 2004 february 2, 2005 august 22, 1989 NonStop-UX B22 NonStop-UX B31 NonStop-UX Cxx NonStop-UX C51 NonStop-UX C52 NonStop-UX C53 NonStop-UX C60 NonStop-UX C62 april 10, 1987 SCO UNIX 3.2.4 june 12, 1995 august 20, 1997 november 14, 1997 june 3, 1998 october 2, 2002 february 6, 2004 OpenServer 6 PWB/UNIX PWB 2.0 XENIX 3.0 SCO XENIX SCO XENIX System V/386 november 22, 1993 november 1, 1994 february 1996 december 8, 1998 OpenServer 5.0.5a april 20, 2000 OpenServer 5.0.6 OpenServer 5.0.6a october 19, 2001 may 3, 2002 january 17, 2003 OpenServer 5.0.7 OpenServer 5.0.7 Update Pack 1 OpenServer 5.0.7 Update Pack 3 OpenServer 6 PWB 1.0 PWB 1.2 XENIX OS XENIX 2.3 SCO XENIX 3.0 SCO UNIX System V/386 (Open Desktop) OpenServer 5.0 OpenServer 5.0.2 OpenServer 5.0.4 OpenServer 5.0.5 OpenServer 5.0.7 (announced) OpenServer 5.0.7 Update Pack 2 (Legend beta) 1974 july 1, 1977 1978 april 1983 System V/286 SCO XENIX System V/386 release 2.3.4 february 1999 august 21, 2000 june 8, 2001 february 24, 2003 july 31, 2003 july 9, 2004 june 22, 2005 august 25, 1980 february 1984 october 1987 release 3, 1989 Trusted XENIX 2.0 Trusted XENIX 3.0 1994 may 9, 1995 june 1996 may 1997 august 12, 1998 Debian GNU/Hurd G1 Debian GNU/Hurd H2 Debian GNU/Hurd H3 august 26, 2002 Debian GNU/Hurd Debian GNU/Hurd K5 february 18, 2004 Debian GNU/Hurd K7 Debian GNU/Hurd K8 february 23, 2005 Debian GNU/Hurd K9 Debian GNU/Hurd K10 1985 june 1989 Trusted XENIX 4.0 Unicos-max 1.0 Unicos-max 1.1 Unicos-max 1.2 Unicos-max 1.3 Debian GNU/Hurd A1 Debian GNU/Hurd J1 Debian GNU/Hurd K2 Debian GNU/Hurd K3 Debian GNU/Hurd K4 Debian GNU/Hurd K6 january 9, 1991 april 8, 1992 september 17, 1993 october 10, 2001 december 4, 2001 february 26, 2002 Debian GNU/Hurd J2 K1-Unstable november 24, 2003 may 9, 2004 september 22, 2004 december 30, 2004 may 13, 2005 october 26, 2005 GNU (Trix) GNU november 15, 1993 june 10, 1994 november 30, 1994 november 15, 1995 GNU 0.1 (GNU/Hurd) GNU 0.2 (GNU/Hurd) august 2000 GNU (GNU/Hurd, august 5, 2002 october 10, 2002 march 3, 2003 april 30, 2003 july 29, 2003 (GNU/Hurd) december 12, 2002 1986 september 6, 1996 june 12, 1997 GNU Mach 1.3) Gnuppix GNU/Hurd-L4 Plan 9 may 7, 1991 Plan 9 r2 may 27, 2002 GNU/Hurd-L4 Plan 9 Plan 9 r3 Plan 9 r4 (announced) 0503 UNIX System 1990 Trusted IRIX/B 4.0.5 EPL july 1995 june 7, 2000 V/286 UNIX System UNIX System V/386 UNIX System V/386 UnixWare 1 april 28, 2002 november 18, 2002 march 1, 2005 UNIX System V Release 3.2 AMiX 1.1 (Amiga Unix SVR4) AMiX 2.2 february 6, 1995 UnixWare 7 Open UNIX 8 MP1 Open UNIX 8 MP2 SCO UnixWare 7.1.3 1985 UNIX System V V/386 rel 3.0 UNIX System V UNIX System V Release 4 Unix System V UnixWare 1.1 UnixWare 1.1.1 UnixWare 7.0.1 UnixWare 7.1 UnixWare NSC 7.1.1+IP UnixWare 7.1.1+LKP UnixWare 7.1.1 DCFS Open UNIX 8 Open UNIX 8 MP3 Open UNIX 8 MP4 SCO UnixWare 7.1.3 SCO UnixWare 7.1.3 SCO UnixWare 7.1.3 /OKP SCO UnixWare 7.1.4 CB UNIX 1 CB CB UNIX 3 UNIX System III UNIX System IV UNIX System V Release 2 1990 UnixWare 2.1 UnixWare 2.1.2 Unix System V Release 5 UnixWare 7.1.1 Release 8.0 Release 8.0 Release 8.0 (announced) 1982 january 1983 Release 3.0 Release 3.2 Release 4 Release 4.2 Unix SVR4.2 Unix System V Release 4.2 UnixWare 2.0 october 1996 september 8, 1998 february 23, 1999 june 26, 2000 august 21, 2000 november 27, 2000 Release 8.0 Release 8.0 december 4, 2002 Update Pack 1 july 31, 2003 june 15, 2004 UNIX 2 november 1981 april 1984 february 13, 1996 march 3, 1998 december 30, 1999 june 11, 2001 august 8, 2001 november 6, 2001 february 12, 2002 july 3, 2002 august 26, 2002 may 8, 2003 Diamond SVR6 1986 1987 Acorn RISC Unix 1988 Atari Unix ASV (dev release) november 2, 1992 ASV (final release) may 18, 1993 1994 Unix System V Release 4.2MP Unicos/mk 1.2.5 Unicos/mk 1.4.1 Unicos/mk 1.6 Unicos/mk 2.0 Unicos/mk 2.0.3 Unicos/mk 2.0.6 (announced) january 1995 Unicos/mk 1.3 Unicos/mk 2.0.4 Unicos/mk 2.0.5 1988 1989 1991 august 1992 Dynix/ptx 4.4 november 11, 1996 december 9, 1996 march 3, 1997 july 21, 1997 october 13, 1997 may 1998 Dynix/ptx 4.5 october 18, 1999 january 2002 august 3, 2004 Dynix Dynix/ptx 2.0.4 january 25, 1999 Dynix/ptx 4.5.3 USG 1.0 USG 2.0 USG 3.0 1996 Dynix/ptx 4.4.4 1999 october 2001 1984 Chorus Chorus/MiX V3.2 Chorus/MiX SVR4 1993 1998 Linux 2.6.0-test1 Linux 2.6.0-test11 Linux 2.6.0 Linux 2.6.1 Linux 2.6.6 Linux 2.6.7 Linux 2.6.8.1 Linux 2.6.9 Linux 2.6.10 Linux 2.6.11 Linux 2.6.12 Linux 2.6.13 Linux 2.6.15 Linux 2.6.16 Chorus/MiX SVR4 Chorus/MiX SVR4 Linux 2.6.4 Linux 2.6.8 Linux 2.6.14 1986 1988 1991 Unicos 10.0.1.1 Unicos 10.0.1.2 july 13, 2003 november 26, 2003 december 17, 2003 january 8, 2004 march 10, 2004 may 9, 2004 june 15, 2004 august 13, 2004 august 14, 2004 october 18, 2004 december 24, 2004 march 2, 2005 june 17, 2005 august 28, 2005 october 27, 2005 january 2, 2006 march 20, 2006 TS 1.0 TS 2.0 TS 3.0 TS 3.0.1 TS 4.0.1 TS 5.0 TS 5.2 XCOS XCOS 0.9 Unicos 1.0 Unicos 2.0 Unicos 3.0 Unicos 4.0 Unicos 5.0 Unicos 6.0 Unicos 7.0 Unicos 8.0 Unicos 9.0 Unicos 9.1 Unicos 9.2 Unicos 9.3 Unicos 10.0 Unicos 10.0.0.2 Unicos 10.0.0.3 Unicos 10.0.0.4 Unicos 10.0.0.5 Unicos 10.0.0.6 Unicos 10.0.0.7 Unicos 10.0.0.8 Unicos 10.0.1.0 1977 1978 1979 1980 1981 1982 1983 1984 february 14, 1991 may 1998 october 1998 february 1999 may 1999 june 1999 january 2000 june 2001 may 2002 may 2003 sept. 1985 april 3, 1986 december 19, 1986 september 25, 1987 Xinu 7 july 15, 1988 may 15, 1989 october 29, 1992 march 11, 1994 september 21, 1995 march 15, 1996 january 13, 1997 august 1997 november 19, 1997 Xinu 8 november 22, 2000 PC/IX Xinu Xinu Xinu march 1988 Unix System V 1998 Linux 2.4.0 test12 Linux 2.4.15 Linux 2.4.17 Linux 2.4.18 1984 Trusted Unicos 8.0 Linux 2.4.0 test 1 Linux 2.4.0 test8 Linux 2.4.0 Linux 2.4.3 Linux 2.4.5 Linux 2.4.7 Linux 2.4.19 Linux 2.4.20 Linux 2.4.21 Linux 2.4.22 Linux 2.4.23 Linux 2.4.24 Linux 2.4.25 Linux 2.4.26 Linux 2.4.27 Linux 2.4.28 Linux 2.4.29 Linux 2.4.30 Linux 2.4.31 Linux 2.4.32 CTIX/386 CTIX 3.0 CTIX 3.2 CTIX 4.0 Release 4.1ES march 9, 1995 december 12, 2000 november 23, 2001 december february 25, 2002 MERT Interactive 386/ix UNIX Interactive 4.1a UNIX Interactive 4.1.1 may 25, 2000 september 8, 2000 january 4, 2001 march 30, 2001 may 25, 2001 july 20, 2001 august 3, 2002 november 28, 2002 june 13, 2003 august 25, 2003 november 28, 2003 january 5, 2004 february 18, 2004 april 14, 2004 august 7, 2004 november 17, 2004 january 19, 2005 april 3, 2005 may 31, 2005 november 16, 2005 RT 1.0 Interactive december 1992 june 1994 Security-Enhanced Linux 1.0 S-E Linux 2.0 21, 2001 1974 IS/1 IS/3 IS/5 1985 UNIX Interactive 4.1 UNIX Interactive 4.1 july 21, 1998 1977 Microport Microport Unix V/386 MVS/ESA OpenEdition SP4.3.0 MVS/ESA OE SP5.2.0 OS/390 OpenEdition V1R1 OS/390 OpenEdition V1R2 OS/390 Unix V2R4 OS/390 Unix V2R6 OS/390 Unix V2R8 december 22, 2000 september 26, 2001 z/OS Unix V1R7 1988 Microport Unix SVR3.2 MVS/ESA OpenEdition SP5.1.0 MVS/ESA OpenEdition SP5.2.1 MVS/ESA OpenEdition SP5.2.2 OS/390 OpenEdition V1R3 OS/390 Unix V2R5 OS/390 Unix V2R7 OS/390 Unix V2R9 OS/390 Unix V2R10 z/OS Unix System Services V1R1 z/OS Unix V1R2 z/OS, z/OS.e Unix V1R3 z/OS, z/OS.e Unix V1R4 z/OS, z/OS.e Unix V1R5 z/OS Unix V1R6 Unix SV/AT september 1987 Microport Unix SVR4.0 Microport Unix SVR4.1 march 26, 1993 september 13, 1994 september 29, 1995 march 29, 1996 september 27, 1996 september 26, 1997 september 25, 1998 september 24, 1999 september 30, 2005 january 1986 june 24, 1994 june 20, 1995 march 28, 1997 march 27, 1998 march 26, 1999 march 31, 2000 HP-UX 11i september 29, 2000 march 30, 2001 october 26, 2001 march 29, 2002 september 27, 2002 march 26, 2004 september 24, 2004 HP-UX 2.0 HP-UX 7.0 HP-UX 7.08 HP-UX 8.0 HP-UX 9.0 HP-UX 9.02 HP-UX 9.03 HP-UX 9.04 HP-UX 9.05 HP-UX 10.01 HP-UX 11i v1 HP-UX HP-UX 1.0 HP-UX 1.2 HP-UX 3.0 HP-UX 8.07 1994 HP-UX 10.0 HP-UX 10.10 HP-UX 10.20 HP-UX 10.30 HP-UX 11.00 (B.11.11) HP-UX 11i v1 1987 1988 1989 1990 1991 1992 1993 1993 november 1993 july 1995 Linux 2.3.0 Linux 2.3.14 Linux 2.3.51 HP-UX 11i v1.5 (B.11.20) HP-UX 11i v1.6 (B.11.22) december 2004 IBM IX/370 1986 1988 1991 HP-UX BLS 8.04 HP-UX BLS 9.09+ february 9, 1995 february 1996 september 4, 1996 august 1997 november 1997 june 14, 2000 MkLinux Pre-R2 HP-UX 11i v2 HP-UX 11i v2 HP-UX 11i v2 HP-UX 11i v2 september 2005 1985 december 1, 1994 Mk Linux DR2 Mk Linux DR3 MkLinux Pre-R1 may 11, 1999 august 19, 1999 march 10, 2000 may 2001 june 10, 2002 august 5, 2002 BOS september 21, 1993 Mk Linux DR1 Mk Linux DR2.1 july 31, 1998 1999 MkLinux R1 Linux 2.5.44 Linux 2.5.48 Linux 2.5.65 Linux 2.5.68 Linux 2.5.70 Linux 2.5.75 (B.11.23) (B.11.23) (B.11.23) (B.11.23) SPIX SPIX 32 december 1996 Linux 2.5.0 Linux 2.5.3 Linux 2.5.5 Linux 2.5.10 Linux 2.5.18 Linux 2.5.30 Linux 2.5.52 Linux 2.5.62 october 2003 march 2004 1989 1996 december 11, 1999 october 19, 2002 november 18, 2002 december 15, 2002 february 17, 2003 march 17, 2003 april 19, 2003 may 26, 2003 july 10, 2003 september 2004 may 2005 1982 Linux 0.01 Linux 0.02 Linux 0.12 Linux 0.95 Linux 0.99.11 Linux 0.99.15j Linux 1.0.6 Linux 1.0.9 Linux 1.2 Linux 1.2.13 Linux 2.0 Linux 2.0.21 Linux 2.0.28 Linux 2.0.37 Linux 2.0.38 Linux 2.0.39 november 23, 2001 january 30, 2002 february 19, 2002 april 24, 2002 may 25, 2002 august 1, 2002 AIX PS/2 Linux 1.0 Linux 2.0.36 Linux 2.0.40 UCLA Locally Cooperating AIX PS/2 & AIX/370 august 1, 1991 october 5, 1991 january 16, 1992 march 8, 1992 july 18, 1993 march 2, 1994 march 14, 1994 april 3, 1994 april 17, 1994 march 7, 1995 august 2, 1995 june 9, 1996 september january 14, 1997 november 15, 1998 june 14, 1999 august 25, 1999 january 9, 2001 february 8, 2004 Unix Systems UCLA Locus Locus Locus AIX PS/2 1.1 AIX/370 20, 1996 1981 1983 1985 1.2.1 1980 march 31, 1989 1.2 february 22, 1991 AIX PS/2 1.3 Linux 1.1.95 Linux 1.3.100 Linux 2.2.0 Linux 2.2.8 Linux 2.2.22 march 30, 1990 Linux 1.1.0 Linux 1.1.52 Linux 1.3 Linux 2.1 Linux 2.1.32 Linux 2.1.132 Linux 2.2.12 Linux 2.2.13 Linux 2.2.16 Linux 2.2.17 Linux 2.2.18 Linux 2.2.19 Linux 2.2.20 Linux 2.2.21 Linux 2.2.23 Linux 2.2.24 Linux 2.2.25 Linux 2.2.26 Venix 2.0 october 2, 1992 april 6, 1994 october 6, 1994 march 2, 1995 june 12, 1995 may 10, 1996 september april 5, 1997 december 22, 1998 january 26, 1999 may 11, 1999 august 26, 1999 october 19, 1999 june 7, 2000 september 4, 2000 december 11, 2000 march 25, 2001 november 2, 2001 may 20, 2002 sept. 16, 2002 november 29, 2002 march 5, 2003 march 17, 2003 february 24, 2004 Venix Venix 1.0 Venix/286 Venix 4.2 1985 1986 Venix 3.2 Venix 3.2.3 Venix 3.2.4 30, 1996 Minix 1.0 Minix 1.5 Minix 1.7.2 Minix 2.0.0 Minix 2.0.2 Minix 2.0.3 Minix 2.0.4 Minix 3.0, 3.1, 3.1.1 Minix 3.1.2-B2 Minix 1987 january 1997 may 22, 2001 october 24, 2005 march 28, 2006 AIX/ESA 1 AIX/ESA 2.1 december 1992 AIX/ESA 2.2 march 1996 december 1998 november 23, 2003 1991 1992 1994 AIX/RT 2 AIX/RT 2.2.1 AIX/6000 v3 AIX 5L v5.1 AIX 5L v5.3 Note 1 : an arrow indicates an inheritance like a compatibility, it is not only a matter of source code. AIX/RT 2.1.2 AIX 3.1 AIX 3.2 AIX 3.2.4 AIX 3.2.5 AIX 4.1 AIX 4.1.1 AIX 4.1.3 AIX 4.1.4 AIX 4.2 AIX 4.2.1 AIX 4.3 AIX 4.3.1 AIX 4.3.2 AIX 4.3.3 AIX 5L 5.0 AIX 5L v5.2 AIX 5L v5.3.0 1986 1987 1989 1990 may 4, 2001 (announced) august 30, 2004 Open Systems 1990 Coherent 4.0 Coherent 4.2 july 1993 october 15, 1993 august 12, 1994 october 28, 1994 Coherent 4.2.10 july 7, 1995 october 20, 1995 may 17, 1996 april 25, 1997 october 31, 1997 april 24, 1998 october 23, 1998 september 17, 1999 october 24, 2000 october 18, 2002 july 13, 2004 may 26, 2006 Note 2 : this diagram shows complete systems and [micro]kernels like Mach, Linux, the Hurd... This is because Coherent Coherent 3.0 june 1983 may 1992 may 1993 1995 Monterey Éric Lévénez 1998-2006 sometimes kernel versions are more appropriate to see the evolution of the system. A/UX 1.0 A/UX 2.0 A/UX 3.0 A/UX 3.1.1 AIX 4.1.5 Minix-VMD 1.7.0