The most popular service on networks – it's e-mail. Each user is assigned a network address such as. And it can send emails to point the planet, unless, of course, your correspondent also has an email address. Most often these letters reach their destination within a few hours. Another option – a subscription to the so-called conference call. The Internet information on virtually any subject, but it is grouped by thematic sections: Politics, Computers, Leisure, Philosophy, etc. Each section contains, in turn, a lot of subsections. For example, Section Computers There are subsections: Software, Hardware, Networks, Artificial Intelligence, etc.
The topics can also have their own division. All this is reflected in the title of a teleconference. For example, in the conference relcom.comp.language.pascal discusses issues related to programming in Pascal.