What open source DB is shipped along with Ubuntu and so is on millions of computers today? If you guessed MySQL you lose. If you guessed CouchDB you are today’s lucky winner. Yes, thats right, CouchDB is shipped with every version of Ubuntu and in terms of computers with it loaded on may be the biggest of the open source databases.
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Original title and link: CouchDB: The Most Widely Distributed, NoSQL Open Source DB (NoSQL databases © myNoSQL)