The present study is an updating of Robert J. Nelson's ERIC Focus Report No. 11 (1969) "Using Radio to Develop and Maintain Competence in a Foreign Language." Two major areas are examined: (1) the concepts behind the use of radio in language teaching and how this application of radio reflects changes in the theory and practice of foreign language learning in general; and (2) the technical aspects of application, regarding both equipment (receivers, antennas, etc.) and information on reception (changes in frequencies, conditions of reception, etc). An extensive bibliography concludes the study. (Author/PMP)