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Usenet is a world-wide distributed discussion system. It consists of a
set of "newsgroups" with names that are classified hierarchically by
subject. "Articles" or "messages" are "posted" to these newsgroups by
people on computers with the appropriate software -- these articles are
then broadcast to other interconnected computer systems via a wide
variety of networks. Some newsgroups are "moderated"; in these
newsgroups, the articles are first sent to a moderator for approval
before appearing in the newsgroup. Usenet is available on a wide variety
of computer systems and networks, but the bulk of modern Usenet traffic
is transported over either the Internet or UUCP.
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