For the 13th year in a row in the last week of October (this year on October 25-31) the world celebrates International Open Access Week, which covers issues of free access to scientific publications and research data. This year, the week is held under the slogan “It Matters How We Open Knowledge: Building Structural Equity.”

Open access has grown significantly over the last five years. Plan S, announced by the European Science Association in September 2018, was a significant boost in order to that after 1 January 2020, all research results funded by public grants provided by national and European research councils and financial organizations must be published exclusively in open access journals or on appropriate open platforms.

More and more publishers and organizations are partially or completely switching to the open access model.

According to the Scopus, there is an increase in open access publications (Fig. 1). Thus, in 2020, the Scopus database has 1547024 open access publications compared to 602537 in 2011.

Figure 2. The number of publications in Scopus for 2011-2020

Analyzing the open access publications of 2011-2020 according to the scientist's affiliation to the country, it can be stated that the leading positions are held by the United States (2759246 publications), China (1257163), Great Britain (1086261), Germany (711778) and France (542745) (Fig. 2)

Figure 2. Geography of open access publications for 2011-2020

At Sumy State University, the main conductors of open access are the SumDU Repository an electronic archive of academic texts of students and researchers of the university; sites of scientific periodicals of the university with access to full-text archives of journals; open educational resources of the university.