Interesting and that sounds quite plausible.   CCA sold it at one point.
Masscomp (because Steve was working for us) got a license and a
redistribution license.   IIRC: we could redistribute the binary for free
as long as CCA got Steve's changes back.

Steve definitely did the terminfo/lib work for CCA Emacs at Masscomp, as I
had pointed out that AT&T was moving to terminfo but was locking it up
inside of the System V (AT&T 'consider it standard' stuff - much to a
number of their own people telling them not too).   Pavel ?? Curtis I think
?? - I've forgotten his last name -  had written a new uncontaminated
version at Cornell that was a functional replacement and that could read
the AT&T ASCII database and compile them properly.   (I don't remember if
Pavel's version could take the AT&T binary versions).  I had obtained
Pavel's version and we were shipping that as our terminfo/lib
implementation on the Masscomp boxes and were switching our code to use it,
as we had not yet signed a System V license and were shipping on a System
III based one.    Steve started to include Pavel's library in the CCA
version, which he got from me.
ᐧ

On Tue, Jun 11, 2019 at 1:12 PM Lars Brinkhoff <lars@nocrew.org> wrote:

> Clem Cole wrote:
> > 1.) Zimmerman EMACS (a.k.a. CCA EMACS) ran on the PDP-11 originally
> > when Steve wrote it at MIT.
>
> I have this on the origin of Montgomery and Zimmerman Emacs:
>
>   "[Montgomery's] emacs implementation was begun in 1979, after having
>   left MIT.  I made it freely available to people INSIDE of Bell Labs,
>   and it was widely used. It was never officially "released" from Bell
>   Labs."
>
>   "Unfortunately, several copies did get out during that time, mainly
>   due to people who left Bell Labs to return to school or gave copies to
>   friends.  When Zimmerman modified one of those copies as the original
>   basis for CCA emacs, AT&T and CCA had a prolonged debate over it.
>   Eventually the matter was resolved when Zimmerman replaced the last of
>   my code"
>
>
> https://github.com/larsbrinkhoff/emacs-history/blob/sources/Usenet/net.emacs/btl-emacs-2.txt
>