Scripting languages are the hot technology today for application and Web development -- no longer the backwater afterthought of the early days running in a pokey interpreter. Nor are scripting languages any longer merely the tool used for quick-and-dirty patching (someone once called Perl <a href="http://www.infoworld.com/%5Bprimary-term-alias-prefix%5D/%5Bprimary-term%5D/whatever-happened-perl-012">the duct tape of the Internet</a>, and it stuck so well that Perl lovers wear the label proudly). No, today, scripting languages are popular for "real" programming work. In fact, entire systems and large-scale enterprise-grade projects are built from them.