About 600 audio tapes are cataloged in this supplement to the 1970-71 catalog (ED 038 854). The catalog is organized in three sections. The subject index, based on the Library of Congress subject area classification scheme, includes these categories: art, education, languages and literature, mathematics, physical education and recreation, science, social science, and vocational-technical. Each category is subdivided into school subjects. The second section, a descriptive listing arranged numerically by stock numbers, includes a one- or two-sentence description of each tape or series of tapes. The listing indicates the grade level where the programs may be used most effectively, and tapes for the primary, intermediate, junior high, senior high, college, and adult levels are covered. Also included are running times and ordering information. The third section lists the tapes and series alphabetically by title. (JK)