Because of prevailing dissatisfaction with the 1967 version, a revised version of Chapter 12 of the Anglo-American Cataloging Rules was published in 1975. The scope of the chapter was greatly expanded to cover charts, dioramas, flash cards, games, kits, microscope slides, models, realia, slides, transparencies, and videorecordings as well as motion pictures and filmstrips. Another major change was the introduction of a system of formal punctuation following the principles of the International Standard Bibliographic Description for Monographs (ISBD (M) ). In this paper, each rule in the revised chapter is compared with the corresponding rule from the 1967 edition. Specific copies of Library of Congress catalog records are included to illustrate the differences. (Author/PF)