<DIV>The Dewey Decimal Classification system (DDC) is the world’s most popular library classification system. This second edition of <I>The Theory and Practice of the Dewey Decimal Classification System</I> examines the history, management and technical aspects of the DDC up to its latest edition, which was published in 2011. The book explains the structure and number building techniques in the DDC and reviews all aspects of subject analysis and number building by the most recent version of the DDC. Chapters offer a history, review subject analysis, review how to locate class numbers, use the tables and subdivisions therein, multiple synthesis, and how to use the relative index. The appendix identifies and asks a number of academically-interesting questions.</div>