A seven part hierarchy was adopted, where sets of groups were organized by major topic. Big Seven Newsgroup Domains Domain Name Major Topic Area comp. Computer related topics misc. Miscellaneous topics news. Usenet itself and related software rec.
Recreational activities sci.
Scientific issues soc. Social discussion talk. One other important domain is alt , for which there are no requirements to start a group. If you have an idea for a group, you're free to launch one. No topic is off limits here, and groups with brief life spans and limited relevance appear regularly.