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Sony Corp.'s employee Rumi Yamaguchi smiles in front of a special display commemorating the Sony Walkman's 30th anniversary that opens Wednesday, July 1, 2009, at Sony Archive building in Tokyo, Japan. The first portable cassette-tape player Walkman, shown second from left on the top shelf, hit the Japanese market on July 1, 1979. (AP Photo/Shuji Kajiyama)
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