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SDNB
000 Generalities, Science004 Data processing Computer sciences070 News media, journalismn, publishing130 Paranormal phenomena150 Psychology333.7 Natural resources, energy and environment380 Commerce, communications, transport390 Customs, etiquette, folklore400 Language, Linguistics440 Romance languages French520 Astronomy & allied sciences620 Engineering & allied operations624 Structural and Environmental Engineering780 Music891.8 Slavic Literature