What is the Dewey Decimal System (Dewey Decimal Classification or DDC)?
DDC – Dewey Decimal Classification is the system used in most libraries for arranging library books and materials on library shelves in a specific and repeatable order that makes it easy to find any book and return it to its proper place. Libraries in more than 135 countries use the DDC to organize and provide access to their collections, and DDC numbers are featured in the national bibliographies of more than 60 countries. Libraries of every type apply Dewey numbers on a daily basis. DDC was developed by Melvil Dewey in 1876, and has been greatly modified and expanded through 22 major revisions, the most recent in 2004. A designation such as Dewey 16 refers to the 16th edition of the DDC. For example, the collection of Los Angeles Public Library (LAPL) is based on DDC 14, the 14th edition of Dewey (1942). When the first books on computers came out they were placed in a mathematics number (510.78) as an extension of books about calculating machines. Newer books about computers continue
