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*1952 Nippon Telegraph and Telephone Public Corporation established
*1979 INS Concept announced
*1985 Nippon Telegraph and Telephone Corporation (NTT) incorporated as a private company
*1987 NTT listed on the First Section of the Tokyo Stock Exchange
*1988 NTT DATA Corporation started operations
*1990 VI&P Concept announced
*1992 NTT Mobile Communications Network, Inc. (presently NTT DOCOMO) started operations
*1994 Basic Concept for the Coming Multimedia Age announced
*1995 NTT

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