AARP, originally the American Association of Retired Persons, is a nonprofit organization established in 1958 by Dr. Ethel Percy Andrus. It focuses on improving the quality of life for Americans aged 50 and older, with an emphasis on health insurance access, financial security, and social engagement. AARP has grown to become the largest nonprofit membership organization in the U.S., boasting over 37 million members.

The organization offers a variety of services, including health insurance plans, a mail-order pharmacy service, and educational programs through the AARP Institute of Lifetime Learning. AARP also advocates for policies that benefit older Americans, publishes "AARP The Magazine," and encourages community involvement and volunteerism among its members. Its mission is to enhance the quality of life for older adults, promoting independence and dignity while addressing the challenges of aging.