Usenet is a collection of notes on various subjects
that are posted to servers on a worldwide network. Each subject
collection of posted notes is known as a newsgroup. There are
thousands of newsgroups and it is possible for you to form a new one.
Most newsgroups are hosted on Internet-connected servers, but they can
also be hosted from servers that are not part of the Internet.
Usenet's original protocol was UNIX-to-UNIX Copy (UUCP), but today the
Network News Transfer Protocol (NNTP) is used.