A parsing Perl script (actually located in http://db.cs.helsinki.fi/hahonen/cgi-bin/collStudInfo.pl).
A Perl script using CGI package, object-oriented (actually located in http://db.cs.helsinki.fi/oheinone/cgi-bin/collStudInfo2.pl ).
A Perl script using CGI package, "normal" (actually located in http://db.cs.helsinki.fi/oheinone/cgi-bin/collStudInfo3.pl ).