The diligent use of two-way voice links via satellites substantially improves the quality and the availability of health care and educational services in remote areas. This improvement was demonstrated in several experiments that were sponsored by the Department of Health, Education, and Welfare and the National Aeronautics and Space Administration. From 1972 to 1975, these experiments used the ATS-1, ATS-3, ATS-6 (Applications Technology Satellites) to examine the benefits of several different service-delivery configurations, in which one-way video, two-way audio/data, and two-way links to 23 states were involved. (Author/EMH)