Two longtime Perl programmers show how the CGI scripting language can accomplish the tasks needed for many online applications. Each chapter covers a specific Web-based application and explains the code line by line (or block by block). Each application works but is incomplete; to show users how to write the software themselves (rather than simply providing copy-and-paste code), Meltzer and Michalski leave out certain features and suggest what can be added based on information from different chapters. Includes an introductory overview for users new to CGI or Perl.