Hi, just one thing ... line 11 needs to be revised as follows:

        print "\tv\tlower case vowel\n\tV\tupper case vowel\n\tn\tnumb
+er\n\tp\tpunctuation mark\n\ta\tany character\n";
[download]

Otherwise your default ($numargs == 0) is showing "l" & "L" for vowels as well as letters.

Other than that ... I like this ... I'm keeping it!

So Long
blackstarr