On July 1, 1979, Sony introduced the first Walkman to consumers in Japan. The model TPS-L2 was the first in a long history of portable stereo devices of thirty years. The shape, size, and data format of portable music players continues to evolve, but for many people my age the Sony Walkman was their first music device. On this 30th anniversary, here’s a timeline view for the term [walkman]. These materials were made browsable via Google News Archive Partner Program. You can easily click the navigation toolbar to zoom in and out on an article, or fit the entire newspaper page in your browsing window.