In contemporary information space, repository formation is one of the urgent tasks of libraries of scientific and educational institutions. Institutional repositories (IRs) provide unhindered access to scholarly works posted by scientists and specialists for general user, increasing the demand for the library's information resources.

The article represents the review of foreign and domestic publications on the formation and development of institutional repositories. The authors consider the advantages of forming Open Access (OA) Repositories both among prospective authors and potential users: archiving and keeping materials in the IR up-to-date, ensuring visibility and possibility of using scientific research through global access, rapid dissemination of research results, increasing the citation of submitted materials, growth of prestige of the organization, the development of scientific communication, etc. The authors found out that placing publications in international archives (arXiv, BioXiv, etc.) or corporate projects (BASE, HathiTrust) has a greater impact on the visibility and potential citation of publications.

The article identifies the problems of formation and use of repositories: labour intensity of content placement process, the complexity of data exchange, copyright management, the lack of incentives in providing information about their scientific work, the need for additional time and labour resources when maintaining the IR, the financial costs of maintaining the repository, and the difficulties of search in the IR. The authors note that the IR functionality depends on the software capabilities. The paper gives the examples of new generation repositories and presents their features: self-filling, automatic classification based on text mining and machine learning, data management processes between different systems, easy-to-use interfaces.