» The FreeBSD Project - 146 days ago (freebsd.org)

FreeBSD is an advanced operating system for x86 compatible (including Pentium? and Athlon?), amd64 compatible (including Opteron?, Athlon?64, and EM64T), ARM, IA-64, PowerPC, PC-98 and UltraSPARC? architectures. It is derived from BSD, the version of UNIX? developed at the University of California, Berkeley.

browse: bsd, documentation, freebsd, official site, unix