FreeBSD History

BSD developed at University of California, Berkeley, as alterations to AT&T Unix
Initial implementation of key Unix concepts, such as sockets, virtual memory, and TCP/IP
386BSD developed to implement BSD Unix on x86 architecture in early 1990s
FreeBSD developed from 386BSD project (as did NetBSD)
Now has 350+ active developers, and 1,000's of contributors

BSD developed at University of California, Berkeley, as alterations to AT&T Unix