in reply to Having a script find itself on the file system in Windows XP and other OSs

For simple cases, $0 is the correct answer.

For more complex cases, you can use FindBin module.

FindBin exports the following variables:

 $Bin         - path to bin directory from where script was invoked
 $Script      - basename of script from which perl was invoked
 $RealBin     - $Bin with all links resolved
 $RealScript  - $Script with all links resolved
I've seen FindBin used in programs which try to work out of the box regardless of the OS they've been run on. MRTG - multi router traffic grapher is one example.

In Section Seekers of Perl Wisdom