What are the major classifications of the Dewey Decimal Classification System?
A. There are ten main categories in DDC. These are divided into ten subcategories, which in turn are divided into further subcategories. The more specific the subject of the item is, the longer the number assigned to it. The DDC is published by Forest Press, which became a division of OCLC Online Computer Library Center, Inc. in 1988, http://www.oclc.org/oclc/fp/index.htm. The Dewey Decimal System 000-099: General works (encyclopedias and similar works) 100-199: Philosophy and Psychology 200-299: Religion 300-399: Social Sciences 400-499: Languages (including dictionaries) 500-599: Natural science 600-699: Applied science 700-799: Arts 800-899: Literature 900-999: History, Geography and Biography. 21. What are the twenty major classes of Library of Congress? A. A: General works B: Philosophy and religion C: History – auxiliary sciences D: History and topography (except American) E-F: American history G: Geography, anthropology, folklore, recreation H: Social sciences J: Political scien