Caution for those considering MSC 5.0

[Henry Spencer]

>  >...  isn't  all  global   data  implicitly
>  >initialized to zero if not otherwise specified?
> 
>   It's true on "many", but not all systems...

This is like saying that 2+2 == 4 is true on many but not all systems.
2+2 == 4 and implicit initialization of globals to zero are both guaranteed
facts in correct implementations of C.  Your own environment will determine
how interested you are in buying and using incorrect implementations.
Personally I think it's a waste of money and time.