A correction to the comment on the source of CB-UNIX.
I was the supervisor of the group in Columbus for a number of years that was
responsible for the development of CB-UNIX. The system was derived
from the UNIX operating system that was used in the SCCS (Switching
Control Center System), which incidentally was the first application
of UNIX outside of research. (UNIX was running on an 11/20, at the time,
without memory management and we deployed the first version of SCCS
in New Jersey Bell in New Brunswick, NJ.)
The SCCS version of UNIX had a number of unique features for the times:
Messages and shared memory were first added to CB-UNIX in about 1975 or
In more recent history, CB-UNIX has been eliminated entirely in favor of
I once had a viewgraph with all this on it which I had great fun trying to
Now for trivia: How many know where in UNIX lore you would find the following
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