SAS Systems

[William S. Frantz]

I assume your literature search on SAS systems has turned up the
considerable literature on IBM's OS/360 and OS/SVS systems.  These
were single address systems that enjoyed considerable commercial
success.  There were many applications/subsystems which used multiple
"tasks" (threads in UNIXspeak) implemented for these systems.

In fact, I think the IBM's current MVS system could be considered
a form of "small number of address space" system.  There are many
cases of multiple tasks in one address space on these systems.
If I remember correctly, it is even an option with the Fortran 
compiler.

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Bill Frantz                   Periwinkle  --  Computer Consulting
(408)356-8506                 16345 Englewood Ave.
frantz@netcom.com             Los Gatos, CA 95032, USA