Bell Labs TOPES

Eric Smith spacewar at
Wed May 13 13:36:34 CDT 2015

On Wed, May 13, 2015 at 7:06 AM, Jason T <silent700 at> wrote:
> On Wed, May 13, 2015 at 2:12 AM, Eric Smith <spacewar at> 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.

Thanks! It's not surprising that I misremembered the acronym many
years later; it's more surprising that I remembered anything about it
at all, after having only heard about it once. I was given a tour of a
CO, and was able to talk to two engineers for about 20 minutes.

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