BSD

Berkeley Software Distribution (usually abbreviated to BSD) was the series of Unix distributions created by the Computer Systems Research Group‎. The CSRG put together the following releases:

Notable releases

• 2.9 BSD - A full release from CSRG, prior releases were patches..
• 2.11 BSD - A still-maintained version for PDP-11s
• 3.0 BSD - Derived from 32v, including a real virtual memory system
• 4.0 BSD - A vastly improved 3.0
• 4.1 BSD - These were mostly betas testing new filesystems & the TCP/IP protocol.
• 4.1a BSD - This included BBN's TCP/IP software
• 4.1b BSD - This version introduced the FFS file system.
• 4.1c BSD - A beta of 4.2, and I think the first version of BSD sockets?
• 4.2 BSD - The first shipping version of BSD with TCP/IP, FFS & termcap for the VAX.
• 4.3 BSD - A version of pre-POSIX BSD, for the VAX.
• 4.4 BSD - Did this version ever ship?
• Net/1 - The TCP/IP source, and other programs free of the AT&T copyrite
• Net/2 - Almost an entire release of all the source. This was the contention in the AT&T vs CSRG lawsuit.
• 4.4 BSD Lite - This was the result of the aformentioned lawsuit. This was 'lite' in that it removed the offending 6 files.
• 4.4 BSD Lite2 - the last release?

386 BSD This is the first Net/2 derived OS that then spawned the Net/FreeBSD os's.