This report describes research on the Curriculum Information Network (CIN) paradigm for computer-assisted instruction (CAI) in technical subjects. The CIN concept was first conceived and implemented in the BASIC Instructional Program (BIP). The primary objective of CIN-based CAI and the BIP project has been to develop procedures for providing each student with an individualized sequence of instruction within the constraints of broader instructional objectives. Although the initial BIP system was for the most part successful in providing individualized problem selection some general weaknesses and specific failures were identified. The present research was concerned with locating problems in BIP's CIN and in developing more robust CIN structures and associated procedures for curriculum sequencing. This research included the implementation of simulation procedure for debugging and preliminary evaluation of CIN-based systems. The simulation was used to examine modifications to BIP's problem-selection procedure. The major effort was the development of a new CIN structure modeled on a semantic network formalism, which was designed to overcome more general limitations of the original CIN structure. The new CIN was implemented in the BIP-II system, and data were collected on the experimental use of this system. (Author)