The R&D sector also comprises private companies active in research. In order to be officially recognised as organisations eligible to participate in schemes of public funding for research, they must be approved by the Ministry of Education, Research, Development and Youth of the Slovak Republic and listed in the Central information portal for research, development and innovation and in the Information system on Science and Research – SK CRIS (Current Research Information System). The list of private companies active in the R&D sector is available in the database of Slovak Centre of Scientific and Technical Information.