Directory of organizations compiled to enable Clearinghouse on the Handicapped to respond to public inquiries and to better understand services of other related information providers. Includes only organizations that are information and direct service providers; thus there is emphasis on information components and data base vendors. Includes only organizations functioning on national level and a small group of international organizations based in the U.S. Alphabetical arrangement by names of organizations. Entry gives address, telephone number, handicapping conditions served, and information about the organization and its information services. Miscellaneous appendixes of organizations. Index.