Excellent - thanks for the pointer. This shows nroff
before troff.
FWIW: I guess I was miss informed, but I had been under the impression
that was the other way around. i.e. nroff was done to be compliant with
the new troff, replacing roff, although the suggestion here is that he
wrote it add macros to roff. I'll note that either way, the dates are all
possible of course because the U/L case ASR 37 was introduced 1968 so by
the early 1970's they would have been around the labs.
nroff was in v2; troff appeared in v4, which incidentally was
typeset in troff.
Because of Joe Ossanna's role in designing the model 37, we
had 37's in the Labs and even in our homes right from the
start of production. But when they went obsolete, they were
a chore to get rid of. As Labs property, they had to be
returned; and picking them up was nobody's priority.
Andy Hall had one on his back porch for a year.
Doug