The American Hospital Association (AHA) is a professional association that seeks to promote quality health care provision by hospitals and health care networks through public policy and providing information about health care and health administration to health care providers and the public. Founded in 1898 with offices in Chicago, Illinois and Washington, D.C., the AHA hosts a Resource Center with over 47,000 books on health care (some services fee based) and maintains a Health Planning and Administration (HEALTH) database that provides current information on health care unrelated to clinical treatment. Membership includes close to 5,000 organizations and 37,000 individuals.