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[[Image:HK Wan Chai Library Inside Bookcase a.jpg|thumb|A library book shelf in Hong Kong arranged using the Dewey classification]]
A '''library classification''' is a system used within a [[library]] to organize materials, including books, sound and video recordings, electronic materials, etc., both on shelves and in catalogs and indexes. Each item is typically assigned a call number, which identifies the ___location of the item within the system. Materials can be arranged by many different factors, typically in either a hierarchical tree structure based on the subject or using a
== Description ==
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