How the Sony Walkman Changed Music, And Still Does [Video]

Ah, the Sony Walkman. You might think it's a relic from the annals of audio history... but you'd be wrong! We go about our lives listening to our own private soundtracks like it's no big deal, but it hasn't always been that way. In fact, it became a very big deal when Sony introduced the first Walkman to the US market in 1980, a year after it was unveiled in Japan.