$^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.

In reply to Re: Idenifying the OS the perl script is runnning on by FunkyMonk
in thread Idenifying the OS the perl script is runnning on by narashima

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