The 99s Museum of Women Pilots is a non-profit museum that seeks to preserve the unique history of women in aviation. It is located in the international headquarters building of the non-profit International Organization of Women Pilots: The Ninety-Nines ("99s") on the grounds of Will Rogers World Airport in Oklahoma City, OK. The 5,000-square-foot (460 m) museum houses the largest collection of historical women aviator artifacts in the world.