Book excerpt: This volume is designed to introduce the principles of music classification to beginning music catalogers, as well as to non-specialist catalogers, and those who only occasionally deal with music materials. It will surely relieve the stress level for general catalogers by providing practical guidelines as well as clarifying and explaining the most commonly used classification systems in the United States--the Dewey Decimal Classification (DDC), the Library of Congress Classification (LCC), and the Alpha-Numeric System for Classification of Recordings (ANSCR).