Heavy emphasis was placed on experiments, and interpretation of experimental results. A set of experiments was designed to yield quantitative information on how the experimental subjects used the full-text-access system, why they used it and how effective it was. A detailed report of work on this topic to date is presented. The in-depth analysis of the Intrex system of bibliographic storage and retrieval is continued. The economic studies of information systems were extended along lines that refined the system models being used for study and that included consideration of networks of information systems. Two Project Intrex-designed display terminals are now in operation and both can engage the Intrex system simultaneously. The terminal has been newly named BRISC (Buffered Remote Interactive Search Console). Users prefer the BRISC to other available terminals because of its large-size characters, bright display and the save-page feature of the terminals. Refinements in the full-text-access system have been made to overcome occasional difficulties experienced in centering text on the cathode-ray-tube screen. (Author/NH)