Walkman's Sony's audio cassette player brand, now used to market its portable audio and video players. The original Walkman introduced a change in music listening habits, allowing people to carry their own choice of music with them. The device was built in 1978 by audio division engineer Nobutoshi Kihara for Sony co-chairman Morita, who wanted to be able to listen to operas during his frequent transpacific plane trips. The original Walkman was marketed in 1979 as the Walkman in Japan, the Sound… (More on Walkman)