The Dewey decimal system is a classification system used for arranging books in libraries. It is an efficient way of organizing information and making it easily accessible to library users. However, there are other synonymic terms that refer to the Dewey decimal system. Some of the synonyms include the Decimal Classification, Dewey Decimal Classification, and the Dewey Classification. All these terms refer to the same classification system used in libraries to categorize books and other materials based on subject matter. Regardless of the synonym used, the Dewey system remains an essential tool for organizing and cataloging resources in libraries.