Tao OSAn OS. See also TAOS VM.
Without having time to write a decent summary, here's a 1994 article from the BYTE magazine. Even though Tao OS/Elate/Intent has progressed in the 10 years since this article was written, this still seems to be a good introduction to the basics.
It's a pity that the multi-processor capability has never been seriously used to my knowledge. Also note that the AmigaDE (or whatever they call it tomorrow) is an attempty to build a (proprietry) scalable OS ontop of the Tao OS.
This is without doubt copyrighted material. Can you demonstrate that you have the rights to republish this article here?
July 1994 / Features / Parallel Course
by Dick Pountain
Body of the article snipped until clarified its status.
This page is linked from: TAOS VM