In dictionaries:
Dewey Decimal Classification
Library material categorization numeric system.
decimal system of classification
Hierarchical organization by numerical codes.
Universal Decimal Classification
a bibliographic and library classification representing the systematic arrangement of all branches of human knowledge organized as a coherent system in which knowledge fields are related and inter-linked.
Nippon Decimal Classification
The (NDC, also called the Nippon Decimal System) a system of library classification developed for mainly Japanese-language books maintained and revised by the Japan Library Association since 1948.
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