Walkman is a Sony brand originally used for portable audio cassette, and now used to market Sony's portable audio and video players. The original Walkman introduced a change in music listening habits by allowing people to carry music with them. The device was built in 1978 by audio division engineer Nobutoshi Kihara for Sony co-chairman Akio 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… (More on Walkman)