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SDNB
004 Data processing Computer sciences060 General organization & museology333.7 Natural resources, energy and environment350 Public administration380 Commerce, communications, transport390 Customs, etiquette, folklore430 Germanic510 Mathematics610 Medical sciences Medicine620 Engineering & allied operations650 Management & auxialiary services670 Manufacturing791 Public performances800 Literature & rhetoric850 Italian, Romanian, Rhaeto-Romanic literatures880 Hellenic literatures Classical Greek910 Geography & travelB Fiction books