Intelligent agents are the final topic in Chapter 11, with emphasis on search and filtering agents. Intelligent agents are applied in a number of different ways; the application chosen for this chapter is a filtering agent that acts as an intermediary to UseNet sites on the Internet. The WebAgent is configured through a simple configuration file. It then autonomously gathers news using the NNTP protocol and presents it to the user with the HTTP protocol (acting as a simple Web server). The WebAgent is provided on the CD-ROM at ./software/ch11 .