This journal issue focuses on the frequency spectrum used in radio communication and on the World Administrative Radio Conference, sponsored by the International Telecommunication Union, held in Geneva, Switzerland, in the fall of 1979. Articles describe the World Administrative Radio Conference as the most important radio communication conference to be held in 20 years, whose purpose was to bring up to date the international regulations applicable to all radio communication services, and whose decisions have the force of a treaty. Other articles explain the frequency spectrum, discuss its management, and outline some of the issues discussed at the conference. Additionally, there are articles on videotex, home video, the use of satellites, and other areas of telecommunication. (MKM)