in reply to Idenifying the OS the perl script is runnning on

$^O (letter O, not zero) will tell you which OS perl was built under, which in your case, should be good enough (it isn't very good at distinguishing between Windows variants).

You can read all about it in perlvar.

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Re^2: Idenifying the OS the perl script is runnning on
by ikegami (Patriarch) on Jul 11, 2007 at 21:48 UTC
    If the program needs to know the flavour of Windows, it can call Win32's GetOSVersion after ascertaining it's running on a Win32 machine.
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