BUILDING DESIGNS WHICH HAVE BEEN SIGNIFICANT IN THE DEVELOPMENT OF THE DIVISIBLE AUDITORIUM AND THEATER AND THE FUNDAMENTAL CONCEPTS OF THE MULTI-PURPOSE FACILITY WERE REVIEWED. WHILE NOT A COMPREHENSIVE COLLECTION OF DIVISIBLE FACILITIES, THE INSTALLATIONS REPORTED ON ARE THOSE THAT APPEAR TO BE LANDMARKS IN THE EVOLUTION OF THE MULTI-USE CONCEPT, AND NOT NECESSARILY THOSE THAT REPRESENT THE HIGHEST DEVELOPMENT OF A PARTICULAR APPROACH TO DIVISIBILITY. THE INSTALLATIONS REVIEWED RANGE FROM TEACHING AUDITORIUMS IN HIGH SCHOOLS TO MULTI-ARTS THEATERS AT A UNIVERSITY. IN ADDITION, A SECTION IS INCLUDED ON THE ACOUSTICS OF THE OPERABLE OR MOVABLE PARTITION WHICH IS OFTEN UTILIZED IN DIVISIBLE FACILITIES. COPIES OF THIS REPORT ARE AVAILABLE FROM EDUCATIONAL FACILITIES LABORATORIES, INC., 477 MADISON AVENUE, NEW YORK, N.Y. (BH)