Library classification

A library classification is a system of organization of knowledge by which library resources are arranged and ordered systematically. Library classifications are a notational system that represents the order of topics in the classification and allows items to be stored in that order. Library classification systems group related materials together, typically arranged as a hierarchical tree structure. A different kind of classification system, called a faceted classification[1] system, is also widely used, which allows the assignment of multiple classifications to an object, enabling the classifications to be ordered in many ways.

A library book shelf in Hong Kong arranged using the Dewey classification

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