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.