AARP (formerly the American Association of Retired Persons) is a United States-based interest group whose stated mission is "to empower people to choose how they live as they age". According to the organization, it had more than 38 million members as of 2018. The magazine and bulletin it sends to its members are the two largest-circulation publications in the United States.
AARP was founded in 1958 by Ethel Percy Andrus (a retired educator from California) and Leonard Davis (later the founder of the Colonial Penn Group of insurance companies). It is an influential lobbying group in the United States focusing largely on issues affecting the elderly. AARP sells paid memberships, and markets insurance and other services to its members. Wikipedia