Sony introduces the Walkman.

Sony Group Corporation is a Japanese multinational mass media & conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions, Sony Entertainment, Sony Interactive Entertainment, Sony Financial Group, and others.

Walkman is a brand of portable audio players manufactured by Sony since 1979. It was originally introduced as a portable cassette player and later expanded to include a range of portable audio products. Since 2011, the brand has referred exclusively to digital flash memory players.