Opus
A {Honeywell} {operating system} promised as a sop to customers after canning {Multics} in 1985. Opus
was to provide everything Multics had and more, plus total
compatibility with the {Level 6}/{DPS6} operating system.
"Opus" was a code name, the system was officially named VS3
(short for HVS R3 or Honeywell Virtual System Release Three).
It was to run on the {DPS6-plus} hardware known internally as
the MRX and HRX, and be all things to all people.
The hardware was a dud (though it did run the native DPS6
software just fine), and the goal was, shall we say,
ambitious. The effort was cancelled by {Bull} in 1987, in
favor of another project going on in France.