This paper focuses on the environmental influences of change in the communication structure of organizations and argues that structural changes in communication networks are increasingly externally induced. The unit of analysis selected for discussion in this paper is the individual organization. A communication network among organizations is generated when analyzing the communication relationships among these organizations along a certain topic or dimension. A network analysis computer program developed at Michigan State University allows with considerable ease the identification of network roles that individual organizations might perform such as group membership, liaisons, and so on. In addition, each individual organization or group of organizations can now be assessed with regard to a degree of centrality, accessibility, dominance, integrativeness, connectedness, and various other indices. Furthermore, suggestions for the development of a dynamic model encompassing exogeneous influences, internal system processing, and endogenous events are made. Some examples of interorganizational communication are discussed, and the implications of interorganizational communication are presented. (Author/RB)