It is estimated that 1,868,000 people are certainly eligible for the services of the Library of Congress Division for the Blind and Physically Handicapped. Between 5,781,500 and 11,384,500 are also possibly eligible. Handicapping conditions which are certainly eligible are severe visual impairment, absence of one or both arms or hands, cerebral palsy, muscular dystrophy, quadriplegia, and hemiplegia. Conditions which are possibly eligible are arthritis, Huntington's disease, learning disabilities, mental retardation, multiple sclerosis, myasthena gravis, Parkinson's disease, spina bifida, spinal cord injury, tumors of the brain and nervous system, and mild forms of cerebral palsy, muscular dystrophy, paraplegia. Appended to the report are detailed reports of the handicapped population which served as the basis of the summarized estimates. (JY)