Sony produced the world's first portable music player, the Walkman in 1979. This line fostered a fundamental change in music listening habits by allowing people to carry music with them and listen to music through lightweight headphones. Walkman originally referred to portable audio cassette players. The company now uses the Walkman brand to market its portable audio and video players as well as a line of former Sony Ericsson mobile phones.
Sony utilized a related brand, Discman, to refer to its CD players. It dropped this name in the late 1990s.