This document discusses resource sharing among libraries. It begins by explaining how the information revolution has led libraries to adopt new technologies and philosophies to disseminate information more cost effectively. It then describes how libraries have realized no single library can acquire all needed materials, making partnerships necessary. The document outlines three phases of development in resource sharing: individual cooperation, linking by technology, and consortia for e-resources. It provides definitions and goals of resource sharing, as well as key areas like interlibrary loans and shared cataloging. The document advocates for resource sharing through library networks and notes technological advances support greater cooperation. It concludes by listing assumptions and tips for effective resource sharing programs.