This document is a final report of a study that assessed students' use of the Information Online (IO) computer catalog at the Indiana University at South Bend (IUSB) library, as well as their skills and attitudes related to library use. The 38 participants completed multiple choice and true/false exercises testing their understanding of the IO catalog and their familiarity with general library terminology, concepts, and specific printed reference tools. The IO portion of the exercise required students to perform searches; transaction logs of the sessions were maintained. Performance on general library skills and IO library catalog skills items are discussed and analyzed to determine the significance of participation in library instruction, frequency of library use, and grade point average. Implications for IUSB library programs and practices are considered in several areas. They include improvements in library instruction methods, including workshops on advanced library topics and interactive computer tutorials; more emphasis on helping patrons limit IO searches to IUSB holdings; and improvements to the periodical holdings list. Potential uses of the microcomputers that have replaced five IO terminals for future assessment of the IO catalog and library instruction are discussed. The library skills survey questionnaire and sample IO screens are appended. (Contains 10 references.) (MES)