•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 250+ active developers, and
1,000's of contributors