The general goal of this research and development program was to facilitate man-machine communication in areas of high military impact, including on-line computing in communications, command, and control. Highlights of this research include: identification of major causes of man-machine communication difficulty for the computer-naive; discovery of major communication structures in human communication that have been omitted from man-machine communication; creation of a process model that exhibits these structures in a form which can be imitated in developing new man-machine processes; a new overview of the function of human communication. Additional research tasks included a survey of the future terminal needs of military computer assisted instruction (CAI), the development of capabilities for on-line interaction between scattered CAI experts, the production of modification kits which connect terminals to general purpose terminals, and the supplementation of knowledge about normal human communication with information gained from the study of communication disabilities. (Author/WBC)