A Brief History of The Walkman - TIME

The portable, revolutionary, take-those-headphones-off-while-I'm-talking-to-you music device turns 30

Walkman - Wikipedia

Walkman - Wikipedia

From Walkman to smartphones: How portable music has evolved - Times of India

The History Of The Walkman

The History Of The Walkman

Walkman Turns 40 Today: How Listening to Music Changed Over the Years

Walkman, Metal Gear Wiki

Sony, History, Products, & Facts

The Evolution of the Walkman - Australian Traveller