Some of these are managed by moderators to assure that messages are on topic and observe certain rules. Bulletin boards on the Internet tend not to be subscriber-based, however. There are more than 25,000 such groups in operation today, covering interests that range from education to windsurfing, from religion to photography, from philosophy to autograph collecting. Fan clubs and health support groups abound. In keeping with the origins of the Internet, newsgroups exist on almost every conceivable topic involving computers and computer languages.
Numerous groups exist to exchange comments on a variety of topics in languages other than English.