Matt Alt writes about the history of the Walkman, the portable cassette player invented in 1979.
The First Sony Walkman Was Released 40 Years Ago Today, 51% OFF
Sony celebrates 40 years of Walkman in Tokyo - The Verge
Sony Walkman celebrates 40 years of playing music on the go
The Sony Walkman is 40 years old
Happy Birthday, Walkman: 10 Facts You Might Not Know About Sony's Music Player - TechPP
The Sony Walkman turns 40 this year
Sony Celebrates 40 Years Of Walkman - X96
FEATURE: Innovation, Colour and Form: Forty-Five Years of Sony's Walkman and Forty Years of the Discman – and Why We Need Modern Updates — Music Musings & Such
Sony releases a Walkman for its 40th anniversary
The First Sony Walkman Was Released 40 Years Ago Today, 51% OFF
Retro Walkman - Sony celebrates 40 years with the 40th Anniversary Edition