Over recent years, the study of industrial districts, and inter-organizational relations has become a major theme of interest in network research. Theories characterized by an increased inter-relatedness between heterogeneous actors and knowledge fields point to a new form of inter-organizational relationship development. This is basicly based on the idea of creating trust between firms to increase their chances of success and to keep pace with the development of all relevant technologies. In this thesis, we present some data from a research project we have conducted in OSTIM industrial district, Ankara, Turkey. First, we present the theoretical perspectives which appear relevant to such investigation, and which aims at developing a better a network model of the inter-organizational relations of district firms, as well as trust, informal contracts and centrality issues, particularly as regards technological innovation and technology transfer of firms, respectively. Moreover, the evidence presented in this thesis is unequivocal in noting that long term inter-organizational relations and trust may be a necessary and a sufficent condition for a small and medium sized enterprise (SME) to take its place in the center of a complex web of inter-organizational relations as seen in an industrial district.