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SDNB
004 Data processing Computer sciences010 Bibliography030 General encyclopedic works070 News media, journalismn, publishing100 Philosophy130 Paranormal phenomena380 Commerce, communications, transport400 Language, Linguistics420 English480 Hellenic languages Classical Greek510 Mathematics624 Structural and Environmental Engineering650 Management & auxialiary services660 Chemical engineering793 Indoor games & amusements830 Literatures of Germanic languages880 Hellenic literatures Classical Greek920 Biography, genealogy, insignia