are there
other tangible[1] manifestations of non-UNIX operating
system things like the GECOS field that were carried forward intact in
later UNIX implementations?
Job control was inspired by ITS job control capabilities. Control-Z
does pretty much the same thing in both operating systems.
I don't think "carried forward" describes job control, which I
believe was never in any Research system. "Borrowed" would be
more accurate. In fact, I don't recall being aware of the
existence of the ITS movement at the time Unix arose.
Doug