informal user group. High-performance windsurfing involves acrobatics such as jumps and

“1978 Jurgen Honscheid came over from West Germany for the first Hawaiian World …”

“high-performance windsurfing techniques and equipment in Hawaii by an informal …”

“Then I remembered the "Chip," a small experimental board we had built with foot…”

“the Sources of Innovation: The Case of Scientific Instruments." Research Policy…”