This project experimentally evaluated the computer-based instruction (CBI) technology of the PLATO IV system. The approach was to conduct a set of eight research studies in different Navy training application areas. Short titles of the studies were: (1) remedial math, (2) oscilloscope simulation, (3) sine ratio, (4) multimeter simulation, (5) learner control, (6) recipe conversion, (7) oscilloscope guidance, and (8) part-task trainer. The final report summarizes the research design, method, results, and findings of each study. Experience, information, and data obtained from the research is then used to evaluate instructional effectiveness, technical features and characteristics, range of training applications, instructional material development methods and effort, and development and delivery costs. Conclusions are drawn and recommendations are made about the use of a PLATO IV type system for CBI. (Author)