More are added each day. Newsgroups are organized in a hierarchy, with the broadest subject first, moving to the most specific, although there can be exceptions to this. Newsgroups can also be created for a very specific group of users and closed to outside users. One example of this are the neosoft. There are also commercial information services that can feed into Usenet as well.
Clarinet is one of the best known services.
One of the first things to do when checking in to a new newsgroup and always before posting, is to read the FAQs. Many Usenet readers become very disappointed when a question is asked repeatedly and are not afraid to let the poster know it. There are many newsreaders available, but some of the most popular include the no-cost Free Agent and the newsreader bundled in with your copy of Netscape . The first time you set up your newsreader takes the longest. Updating the list of 37,000 newsgroups is slow going, especially if you're dialed in on a modem.