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SDNB
004 Data processing Computer sciences060 General organization & museology333.7 Natural resources, energy and environment350 Public administration360 Social services, association390 Customs, etiquette, folklore400 Language, Linguistics491.8 Slavic languages550 Earth sciences720 Architecture780 Music792 Stage presentations793 Indoor games & amusements820 English & Old English literatures980 General history of South America