Sony Corporation: A Case Study in Diversification. Sony Corporation established its global reputation with the introduction of the transistor radio in 1957. For over forty years it has manufactured electronics hardware. In the past five years it has diversified into entertainment, software and a host of related and converging fields. The diversification has been successful because Sony has identified all of its new projects with its brand name and reputation for quality: Its core competency in electronics has been at the heart of its successful diversification. 12 pgs. Bibliography lists 13 sources. Pages: 12 Bibliography: 13 source(s) listed Filename: 3678 Sony Corporation Diversification.doc Price: 107.40