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SDNB
004 Data processing Computer sciences070 News media, journalismn, publishing450 Italian, Romanian, Rhaeto-Romanic510 Mathematics530 Physics560 Paleontology Paleozoology650 Management & auxialiary services690 Buildings760 Graphic arts Printmaking & prints820 English & Old English literatures830 Literatures of Germanic languages930 History of the ancient worldK Children's and youth literatureS School books