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SDNB
000 Generalities, Science004 Data processing Computer sciences060 General organization & museology300 Social sciences310 General statistics320 Political science370 Education380 Commerce, communications, transport500 Natural sciences510 Mathematics540 Chemistry & allied sciences550 Earth sciences570 Life science620 Engineering & allied operations660 Chemical engineering670 Manufacturing790 Recreational & performing arts792 Stage presentations830 Literatures of Germanic languages