Federally funded construction programs for the retarded included are the following: 12 research centers in which biological, medical, social, and behavioral research is conducted to investigate the causes and prevention of mental retardation; 18 university-affiliated facilities for inter-disciplinary training of professional and technical personnel for research and service careers; and 242 community facilities to provide comprehensive community services to the retarded. Public Law 88-164, which authorized construction programs for the mentally retarded, the current status of programs, and federal funding are reported. Photographs and charts are provided. (LE)