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 logo AP Photo 32 months ago

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.