Open Access to scientific information, which means to scientific publications and research data, is related to broader concept of Open Science. The aim of Open Science is to allow anybody, which means university researchers, business sector as well as society, to access some types of publicly funded R&I project results free of charge and on-line. EU framework programme for supporting research, development and innovation titled Horizon 2020 has taken a lead on this issue at the European level. Horizon 2020 grant beneficiaries are obliged to allow open access to their peer-review scientific articles. This obligation is in some case extended to underlying data as well as other non-published data. [ABSTRACT FROM AUTHOR]