Por un escritor de hombre misterioso
Matt Alt writes about the history of the Walkman, the portable cassette player invented in 1979.
The Sony Walkman turns 40 years old today – New York Daily News
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Smithsonian - Would you share your mixtape with us? Forty
Sony celebrates 40 years of Walkman in Tokyo
Sony releases 40th anniversary Walkman at IFA - CNET
40 years of the Sony Walkman celebrated in Tokyo exhibition
40 years of the Sony Walkman celebrated in Tokyo exhibition