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But atleast you will find details of 404 here (A nice trivia)
CERN – Conseil Européen pour la Recherche Nucléaire (European Council for Nuclear Research) – In about 1980. a group of scientists started working on WWW ( which is short of World Wide Web) at CERN. Tim Berner Lee (Known as founder of World wide Web) had an office there at 4th floor. In there in a room 404, they places first World Wide Web Database and thus that become a symbol and later immortalized as a symbol of page not loading.