Just check the standard module list. You can also check the MANIFEST, though that includes everything that ships with Perl and not just the modules. I went ahead and assumed 5.005 as the version, since your version is a couple of years old, but you can check http://perldoc.com/ for your particular version.

Another thing you can do is run a minimum install of Perl at the lowest version level you're likely to support and do all development on that box, if possible. Not only will that limit you to standard modules, you won't accidentally try to use our or other features that your Perl won't support.

Cheers,
Ovid

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