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SDNB
004 Data processing Computer sciences050 General serials & their indexes400 Language, Linguistics450 Italian, Romanian, Rhaeto-Romanic460 Spanish & Portugese languages530 Physics540 Chemistry & allied sciences620 Engineering & allied operations621.3 Electrical Engineering, Electronics690 Buildings790 Recreational & performing arts792 Stage presentations830 Literatures of Germanic languages891.8 Slavic LiteratureS School books