This paper reviews the communicative behavior surrounding the coordination of expert and "semi-expert" groups of scientists and engineers by analyzing several histories of technology that focus on the coordination of research information between a research organization and many development organizations. For the paper's purposes, semi-expert means the members of groups who are more than novices--they possess specialized training and experience in closely related work and they know enough of the language of their fellow researchers to communicate with them. The paper looks only at descriptions of problems and actions related to person-to-person contact in the settings, reviewing histories which describe the vast network of British Cooperative Research Associations that spanned the late 19-teens until well into the 1960s. The paper finds that liaisons, trainers, conferences, open houses, and social occasions were methods in which communication was practiced and encouraged. It discusses these methods. Contains 26 footnotes. (NKA)