This review discusses studies of informal communication of scientific and technical information published in the American management literature between 1976 and 1982. While investigated formerly by information scientists, the subject has been mentioned only infrequently in the literature and abstracts of information science in recent years. Management scientists view the informal information transfer as a special type of organizational communication. Among the papers reviewed, special attention is accorded to the publications byTushman who has extended and developedAllen's approach. The implications of the insights gained for the information worker and information scientist are discussed in the conclusions.