NetBSD took its roots from the original UCB 4.3BSD via the Networking/2 release and 386BSD. The NetBSD project was founded by Chris Demetriou, Theo de Raadt, Adam Glass and Charles M. Hannum. Frustration at getting patches integrated and releases of 386BSD led to FreeBSD, which concentrated the i386 platform, while NetBSD formed to focus on multi-platform support. Since then, in addition to the many developers within the project, it has imported changes from many other sources, including 4.4BSD Lite. NetBSD has also been used as the basis of other derivatives, including the University of Utah's Lites (on top of Mach), and Apple's Rhapsody. Twenty Years of Berkeley Unix The Creation of the UNIX Operating System NetBSD 0.8 (20 Apr 1993) NetBSD 0.9 (23 Aug 1993) NetBSD 1.0 (26 Oct 1994) NetBSD 1.1 (26 Nov 1995) NetBSD 1.2 (04 Oct 1996) NetBSD 1.2.1 (20 May 1997) NetBSD 1.3 (04 Jan 1998) NetBSD 1.3.1 (09 Mar 1998) NetBSD 1.3.2 (29 May 1998) NetBSD 1.3.3 (23 Dec 1998) NetBSD 1.4 (12 May 1999) NetBSD 1.4.1 (26 Aug 1999) NetBSD 1.4.2 (19 Mar 2000) NetBSD 1.4.3 (25 Nov 2000) NetBSD 1.5 (06 Dec 2000) NetBSD 1.5.1 (11 Jul 2001) NetBSD 1.5.2 (13 Sep 2001) NetBSD 1.5.3 (22 July 2002) NetBSD 1.6 (14 Sep 2002) NetBSD 1.6.1 (21 Apr 2003) NetBSD 1.6.2 (01 Mar 2004) NetBSD 2.0 (09 Dec 2004) NetBSD 2.0.2 (14 Apr 2005) NetBSD 2.0.3 (31 Oct 2005) NetBSD 2.1 (02 Nov 2005) NetBSD 3.0 (23 Dec 2005) NetBSD 3.0.1 (24 July 2006) NetBSD 3.0.2 (04 Nov 2006) NetBSD 3.1 (04 Nov 2006) NetBSD 4.0 (19 Dec 2007) A more complete timeline is distributed as part of NetBSD in src/share/misc/bsd-family-tree. bsdtimeline