[Developing Open Access in Ukraine – an example of electronic repository of the Lviv Polytechnic National University] Rapid development of information technology has a deep impact on the nature of worldwide scientific communication. In accordance with the mission of disseminating knowledge, well-known academic institutions not only gather information about academic achievements of their employees, but also build repositories that expose digital content to its members and to the broader research community. The paper presents the development of electronic archives in academies of Ukraine over the past 5 years. Content and size of the archives is characterized. The authors describe the creation process and operating principles of scientific electronic repository „Electronic Scientific Archive of the Lviv Polytechnic National University” (http://ena.lp.edu.ua). Conditions that are necessary for effective development of university repositories, document sources, provision and promotion of the idea of open access are considered. The authors analyze growth of the electronic repository of Lviv Polytechnic National University in the first year of operation and provide usage statistics by different categories of users, including Polish scientists. For statistical data analysis DSpace and Google Analytics tools were used. Major sources of electronic documents in the electronic repository of Lviv Polytechnic National University are defined. The authors conclude that effective cooperation between librarians and researchers is crucial factor in the successful development of an institutional repository
