in reply to Trying to display subcategories and counts

What you'll need to do is, as described above, create some type of data structure out of the file beforehand. What you might want to do is start with a chunk of code like
my($category, $subcategory) = split(/&/, $ENV{'QUERY_STRING'}); if($subcategory ne "") { # Read in the file and look for the subcategory # specified, as you are already doing } else { # Read in the file and count the values in the # subcategory, as per turnstep's answer above. }
This would get you the desired behavior of having a CGI that can handle with and without a subcategory.