An assessment is presented of the Ottawa Public Library Branch Services' success in meeting both the information and educational needs of a highly intellectual community. An outline is presented for appraisal of present services, indicating improvements and recommending directions for future growth. After an examination and evaluation of the present system, additional building sites are suggested to serve the growing community. Five significant sociological challenges to public library systems are examined: (1) the knowledge explosion, (2) technological expansion, (3) social modification, (4) minority needs, and (5) social mobility. Part II examines the history of the Ottawa Public Library and includes a review of individual branches with suggestions for improvement. Extension of patron service and cooperation with school libraries is suggested along with mobile library service to provide bilingual (French) materials, including audiovisual aids, to the bicultural community. Part III covers a plan for branch development. Maps, statistical tables and graphs are included. (DS)