SAS Systems

[Bryan Ford]

>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.

Do each of those tasks "see" (have access to) exactly the same
set of mappings, or do these systems actually have a notion of
protection domain, where different tasks can be given access to
different subsets of the large address space?

Can you point me to any on-line reference material on these systems?

Thanks!
				Bryan