Bell Labs TOPES

[Jason T]

On Wed, May 13, 2015 at 2:12 AM, Eric Smith <spacewar at gmail.com> wrote:
> TOPES was used at least up until the divestiture. There was a
> replacement system under development called MEGS, but I don't know
> whether it was completed and deployed.

According to a book that is partially online in Google Books, it was
replaced by MUGS, "Mini Unix Graphics System," running on 11/780s or
3B20s.

Not a lot of info out there about either system.