This dissertation relates and analysis the development of the Swedish mobile telephone industry from 1950-98. Based on a research of entrepreneurial theories three forms of entrepreneurship are formulated, the individual as entrepreneur, the company as entrepreneur, and the network as entrepreneur. The mobile telephone industry is seen as a technological system incorporating a broad spectrum of participants, and the account analysis how the entrepreneurs carry out different types of innovations. It starts out as a technical project, with market related innovations becoming a greater force in the final phase. The source of entrepreneurship varies over time and the individual plays a significant role early on while the network becomes of a greater importance as the system develops. / Diss. Stockholm : Handelshögsk.