4.4BSD Lite
From Computer History Wiki
4.4 BSD Lite was the final release from the CSRG. After they had to withdrawl the Net/2 source, the files found to be in contention with 32v were removed, and this distribution was released.
Then all of the derived projects had to ensure that they didn't have those files, or anything derived from them.
I think at the time this would have impacted:
Just like Net/2, this was not a complete OS onto itself, however it was the vast majority needed.
