Agusta (Italy)
Bell / Agusta Aerospace Company (U.S.)
Bell Helicopter Textron (U.S.)
Boeing: Military Aircraft & Missiles Systems (U.S.)
Eurocopter (Europe)
Kaman Aerospace (U.S.)
Kamov Company (Russia)
Kazan
Helicopters (Russia)
Mil Helicopter (Russia)
MD Helicopters (U.S.)
Robinson Helicopter Company (U.S.)
Sikorsky Aircraft Corporation (U.S.)
Westland Helicopters (U.K.)
All the World's Rotorcraft (Estonia)
Flying Platforms & Jeeps (U.S.)
German VTO Projects
& Helicopters of World War II (U.S.)
Harrier.org.uk
(U.K.)
Helicopter History Site (Argentina)
Helicopter World (Argentina)
"Mystery" Choppers (Germany)
American Helicopter
Museum & Education Center (U.S.)
Classic Rotors (U.S.)
Helicopter Museum (U.K.)
Hiller Aviation Museum
(U.S.)
Hubschraubermuseum Bückeburg (Germany)
San Diego Aerospace Museum (U.S.)
Joint Strike Fighter Program Office
Lockheed Martin Joint Strike Fighter
Pratt & Whitney JSF F135 Engine
General Electric JSF F136 Engine
Bell / Agusta Aerospace Company
American Helicopter Society,
International (AHS)
International V/STOL Historical Society (IVHS)
Royal Aeronautical Society (RAeS)
Society of Automotive Engineers (SAE)