Navigating the Internet is a lot like navigating through the streets and highways of your hometown. In your hometown, you might use a motor scooter for a quick trip to the library, but you certainly wouldn't try to use it to move your couch to a new apartment. On the Internet many of the same ideas apply. There are fairly established rules for behavior, called netiquette . And the programs you use for different tasks will vary depending on what you are doing, and even personal preference.
Navigator has a web browser, an e-mail program, and a news reader.
But you can download another, more powerful e-mail program like Eudora, and use it instead. In order to understand the Internet, it is helpful to realize that there are many different tasks available to you. You can combine many different software packages together into the system that works for you.