My dissertation study examines the social mechanism s that shape the paths of an open technological field. The primary focus is on internal and external transformations. I tudy internal changes to the technology as it is adopted by diverse institutional actors—across different scien tific communities and national boundaries, and from acade mic to the business sector. External transformations ar e examined by analyzing the relationship between developments in related technological domains with path setting of the studied field. Grid computing—a larg ely open technological field, key to the Cyberinfrastructure and eScience paradigm and to some of the largest scient ific collaborations to date—is used as a case study. Mul tiple methods including participant observations, intervi ws, content analysis and examination of a dynamic participation network over time, are used to invest igate the impact of different levels of socio-technical dynam ics on the studied technology.