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SDNB
004 Data processing Computer sciences200 Religion390 Customs, etiquette, folklore439 Other Germanic languages460 Spanish & Portugese languages500 Natural sciences510 Mathematics540 Chemistry & allied sciences560 Paleontology Paleozoology791 Public performances850 Italian, Romanian, Rhaeto-Romanic literatures860 Spanish & Portuguese literatures891.8 Slavic Literature930 History of the ancient world950 General history of Asia Far East