Bulgarian Academy of Sciences Bulgarian Academy of Sciences: Board, central administration and research units. (Science and Environment) http://www.cu.bas.bg/
Bulgarian Ship Hydrodynamics Centre Bulgarian Ship Hydrodynamics Centre: Conducts research in ship and offshore hydrodynamics, coastal hydraulics, aerodynamics, environment, water transport and information technology. (Science and Environment) http://www.bshc.bg/
IEEE Bulgaria IEEE Bulgaria: Regional section of the institute of electrical and electronics engineers. (Science and Environment) http://www.ieee.bg/
Wide Field Plate Database Wide Field Plate Database: Contains the descriptive information for the astronomical wide-field (>1°) photographic observations stored in numerous archives all over the world. (Science and Environment) http://www.wfpa.bas.bg/
National Center for Information and Documentation National Center for Information and Documentation: Develops and disseminates information products and services, produces and maintains databases. (Science and Environment) http://www.nacid.acad.bg/