Usenet Newsgroups
•Usenet was one of the first large, distributed information databases in the world.
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•A distributed database is stored in multiple physical locations, with portions of the database replicated in different locations.
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•Newsgroups are similar to mailing lists in that they accept messages from users and make them generally available to other users.
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•A Newsgroup stores articles on a server as articles or postings that are sorted by topic.