Explains how to use the software, from basics such as installation to advanced areas such as using newsgroups, working with Java applets, and creating Web pages. Part I explains installation and getting started, and Part II describes advanced features such as multimedia and security. Part III explains how to use Communicator with non-Web Internet systems, and Part IV shows how to publish on the Web. Includes notes, tips, cautions, and sidebars. Material can be read in order or used as a reference. For casual users. Annotation c. by Book News, Inc., Portland, Or.