[MacPerl] $^O stickiness (fwd)

[mark@cheers.jsc.nasa.gov (Mark Manning/Muniz Eng.)]

According to Chris Nandor:
> 
> If you change the value of $^O, it sticks between subsequent invocations of
> other scripts.  :)

Isn't that because $^O is a global variable of Perl (or
rather MacPerl)?  Thus, it is like a program calling a
function.  All of the global variables defined within the
program will also be defined within the function.

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