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Eric Petiot - 潘力克 on Twitter: "[ #Smartphone ] The History of Portable Music https://t.co/nB5rQJNgh3 #Infographic When #Sony introduced the 1st #Walkman in 1979, the portable player was a #gamechanger Thanks to
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MP3: The Meaning of a Format (Sign, Storage, Transmission): Sterne, Jonathan: 9780822352877: Amazon.com: Books
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