This catalog is for the convenience of civil defense officials wishing to make use of OCD exhibits at civil defense meetings or public showings. It contains pictures, brief descriptions, and specifications of the exhibits--and describes procedures for requesting and using them. The major exhibits listed in this catalog are intended for use at national and regional conventions, expositions, State fairs, large county fairs, and other large audience shows. The portable and table top exhibits are intended for use at State and local conventions, county fairs, organizational meetings, and as window and lobby displays.