Perl CGI Programming, the Right Way

One of the best resources for learning Perl CGI programming online
used to be Ovid's CGI Course. I was disappointed to find it no
longer online, but glad to see it in updated form, now maintained by
the Perlmonks community [0]. It always distinguished itself from
other CGI tutorials with its early attention to security and taint
mode [1].  Well worth the read.

[0] http://jdporter.perlmonk.org/cgi_course/
[1] http://perldoc.perl.org/perlsec.html