A survey of online systems in U.S. academic libraries was conducted to gather information on acquisitions, serials, circulation, cataloging, interlibrary loan, and integrated systems. Libraries reported on present systems and future plans, methods of financing, and use of systems personnel, as well as backup systems, type of computer, source for system, and functions within systems. Survey results indicate that 15% of libraries have no online systems and that 16.2% plan no additional ones. Cataloging and interlibrary loan units are the most frequently automated.