The Internet also supports a form of public bulletin board called news.
As of this writing, there were more than 45,000 newsgroups, each devoted to discussion of a particular topic.
Many of the most widely distributed newsgroups are part of a system called Usenet.
To participate in a newsgroup, users post articles (short message) about the newsgroup�s main topic.
As users read and respond to one another�s articles, they create a thread of linked articles.
A newsreader program, the client software, obtains articles from a news server, a host computer that exchange articles with other servers through the Internet, because these servers use the Network News Transfer Protocol (NNTP), they are sometimes called NNTP servers.
To participate in newsgroups, you must run a newsreader program to log on to a server.
Newsgroups are organized into major categories, called domain, and categorized by individual topics within each domain.
Newsgroups are a relatively fast way to distribute information to potentially interested readers, and they allow people to discuss topics of common interest.
Members of many newsgroups post lists of frequently asked questions (FAQ) and their answers every month or two.

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