FreeBSD is a UNIX operating system, which is oriented to i386, IA-64, PC-98, Alpha/AXP and UltraSPARC platforms. It is based on the 4.4 BSD-Lite release of the University of California, Berkeley, with some 4.4 BSD-Lite 2 enhancements. It is not directly based on William Jolitz’s port, which is derived from Berkeley University’s i386 version of “Net/2” or “386BSD”, although only a very small amount of code remains in 386BSD. FreeBSD is used by companies, Internet service providers, researchers, computer experts, students and home users all over the world for their work, teaching and entertainment.
The download address is as follows:
32-bit download: http://dl2.chinaunix.net/disc2/freebsd/7.0/7.0-RELEASE-i386-disc1.iso
64-bit download: http://dl2.chinaunix.net/disc2/freebsd/7.0/7.0-RELEASE-amd64-disc1.iso