Dewey Decimal System
The Dewey decimal system is used in more than 200,000 libraries throughout the world and it has been translated into 35 languages. The Dewey decimal system, using numbers and letters, coordinates materials on the same subject and on related subjects to make items easier to find on the shelves.. All knowledge is divided into ten main classes, which are listed below :
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000 Generalities
100 Philosophy and Psychology
200 Religion
300 Social Science
400 Language
500 Natural Science and Mathematics
600 Technology (Applied Sciences)
700 Arts
800 Literature
900 Geography and History
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