The Indiana Seminar on Information Networks (ISIN) was the result of the realization that many Indiana librarians were not fully aware of the benefits of library networking and were not really using the Indiana TWX network to its fullest advantage. In addition, it was felt that the statewide TWX arrangement and its available services needed more publicity in the state than it had received in the past. A far more important consideration was that a seminar on networking would increase the knowledge of Indiana librarians and would broaden their perspective of the subject, thereby expediting the cooperative efforts so badly needed all over the state. The following topics were discussed: (1) Introduction to Networks; (2) Library of Congress MARC & RECON; (3) NELINET (New England Information Network); (4) An On-line Interlibrary Circulation and Bibliographic Searching Demonstration; (5) Ohio College Library Center; (6) User Response to the FACTS Network; (7) Indiana TWX Network Discussion--Operational Aspects; (8) Indiana TWX Network Discussion--Financial and Organizational Aspects; and (9) How Does the Network Serve the Researcher? (Author/SJ)