Abstract : A brief summary is presented of results obtained during the final period (1 July 1992 to 30 April 1993) under Grant DAAL03-89-K-0130 sponsored by the Army Research Laboratory and the Army Research Office. This report complements earlier reports which summarized the first three years of research under this grant. The research covers list decoding for jammed channels, multiple-access channels with jamming, random-access for channels with large propagation delays, and coding for multiple-access channels. Jammed communication, Multiple-access communication, Random-access communication.