The Monograph Demonstration Project, an experiment in cooperative library development, was conducted by the Council of Ontario Universities from July, 1973 through April, 1975. Objectives of the project were to establish that an automated, on-line cataloging support system is practical within the Ontario University library community, to provide superior cataloging support services at reduced cost, to eliminate duplication of cataloging, and to create a union catalog providing increased capability for rationalization of collections and cooperative university program development. As a result of the project, an automated cataloging support system now serves 16 libraries. The demonstration period proved to be a developmental period rather than a time of uninterrupted services and, as yet, cost reductions are not proven. Some duplication of cataloging activity was eliminated, and the development of a union file began. The researchers conclude with recommendations for the future for Ontario Universities. The original proposal, considerations for terminal selection, and flowcharts of processing procedures using the union cataloging support system are appended. (CH)