The collection contains correspondence, audiotapes, photographs, financial reports, slides, blueprints, and memos related to the activities of International Christian Broadcasting's (originally the World Conference on Mission Radio) work to promote interest in Christian broadcasting and to support and encourage Protestant Christian radio and television broadcasters, largely engaged in evangelism. Materials include data on the International Communications Congress in Tokyo (1970), Muslim Conference (1974), and survey questionnaire for ICB's World Directory of Religious Radio and Television Broadcasting (1973). Photographs total almost 2,000 images; collection contains over 100 audio tapes. Persons featured include evangelical figures involved in religious broadcasting, such as Ben Armstrong, Eugene Berterman, Robert Bowman, Charles Fuller, Billy Graham, Clarence Jones, and Abe Thiessen, and others.