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SDNB
000 Generalities, Science004 Data processing Computer sciences070 News media, journalismn, publishing090 Manuscripts & rare books100 Philosophy300 Social sciences320 Political science430 Germanic450 Italian, Romanian, Rhaeto-Romanic460 Spanish & Portugese languages520 Astronomy & allied sciences530 Physics720 Architecture750 Painting & paintings791 Public performances820 English & Old English literatures840 Literature of Romance languages920 Biography, genealogy, insignia