The American Academy of Orthopaedic Surgeons (AAOS) is an orthopaedic organization.

Founded at Northwestern University in 1933, the AAOS has grown to include over 36,000 members. The group provides education and practice management services for orthopaedic surgeons and allied health professionals. The AAOS also lobbies and works on public education. The AAOS describes itself as "the world's largest medical association of musculoskeletal specialists."

In 1997, the AAOS Board of Directors founded the The American Association of Orthopaedic Surgeons, which engages in health policy and advocacy activities on behalf of musculoskeletal patients and the orthopaedic surgeons.^{[citation needed]} The AAOS publishes the Journal of the American Academy of Orthopaedic Surgeons.

The AAOS annual meeting is among the largest medical meetings in the nation with attendance exceeding 30,000. The most recent meeting was held Feb. 15-19, 2011 at the San Diego Convention Center in San Diego, California. Next year's meeting is scheduled for February 5-9, 2012 in San Francisco, California.

Coordinates: 42°22′51″N 71°06′37″W / 42.380755°N 71.110256°W / 42.380755; -71.110256

The American Academy of Arts and Sciences (American Academy) is one of the oldest and most prestigious honorary societies and a leading center for independent policy research in the United States. Election to the Academy is considered one of the nation’s highest honors since its founding during the American Revolution by John Adams, John Hancock, James Bowdoin and other scholar-patriots who contributed prominently to the establishment of the new nation, its government, and its Constitution.

Today the Academy is with a dual function: to elect to membership finest minds and most influential leaders, drawn from science, scholarship, business, public affairs, and the arts, from each generation, and to conduct policy studies in response to the needs of society. Major Academy projects now have focused on higher education and research, humanities and cultural studies, scientific and technological advances, politics, population and the environment, and the welfare of children. Dædalus, the Academy’s quarterly journal, is widely regarded as one of the world's leading intellectual journals.