Before Apple iPhone, iPod, Sony Walkman made music portable
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Walkman vs. iPod / Sony takes aim at Apple with new music players
From Walkman to smartphones: How portable music has evolved - Times of India
Even After 40 Years, Why My Heart Belongs To The Sony Walkman And Not An Apple iPod
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iPod turns 20: How Apple's music player changed the world, then faded out - ABC News
How to Play Apple Music on Sony Walkman Player | M4VGear
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From Walkman to iPod to Apple Music, how the four recurring patterns of marketing changed the way people connected with music!
Sony Walkman and Apple iPod | Sony discontinued the Walkman … | Flickr
Walkman Outsells iPod in Japan | WIRED
From Walkman to iPod: What Music Tech Teaches Us About Innovation - The Atlantic
With Apple discontinuing iPods, what are the alternatives? | Technology | The Guardian
