"Ted MacNEIL" <[EMAIL PROTECTED]> wrote in message
news:<[EMAIL PROTECTED]
cell00.bisx.prod.on.blackberry>...
> >If a component is removed and renders it useless. it would seem to
be, IMHO, that it is germane to the OS.
> 
> That can be stretched quite a bit, even though I agree with the
statement.
> 
> Can you use z/OS without TSO?
> 

Yes, you can, as well as you can without JES.

On the other hand, if a system mainly runs CICS, removing CICS would
render it useless. Is CICS therefor part of the OS?

I think it is useless to try to find a watertight definition of an OS.

How should we interprete the question: what part of z/OS is OS, so: what
part is 'z'? z/OS *is* the OS.

Kees.



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