Re: "Their operating system, Primos, was based upon Honeywell's development of Multics"
My memory is that it was originally on a GE-645 computer on the top floor of tech square at MIT. I remember seeing the machine there. We used to log on to this machine remotely. I still have the instruction manual for this machine.
Then Honeywell bought out the GE computer department - many stories about the early development times.