Aerospatiale Matra (France); Société de Construction d'Avions de Tourisme et d'Affaires (France) SOKO – Preduzece Soko (Bosnia-Hercegovina); Soko Air Mostar (Bosnia-Hercegovina); Soko Metalopreradijavacka Industrija sa Organicenom Solidarnom Odgovornoscu Oour-A Oour Fabrika Vazduhoplova (Bosnia-Hercegovina); Soko Vazduhoplovna Industrija Radna Organizacija Vazduhoplovstvo (Bosnia-Hercegovina); Sour Vazduhoplovna Industrija Soko (Bosnia-Hercegovina); Vazduhoplovna Industrija Soko DD (Bosnia-Hercegovina) SOKO-CNIAR – see SOKO and CNIAR SOLOY – Soloy Conversions Ltd (United States) SONEX – Sonex Ltd (United States) SOPWITH – The Sopwith Aviation Company Ltd (United Kingdom) SORRELL – C.Hobart Sorrell (United States); Sorrell Aviation (United States) SPARTAN – Spartan Aircraft Company (United States) SPECTER – Specter Aircraft (United States) SPECTRUM – Spectrum Aeronautical LLC (United States) SPEEDTWIN – Speedtwin Developments Ltd (United Kingdom) SPENCER – P.H.Spencer (United States); Spencer Amphibian Aircraft Inc (United States) SPEZIO – Tony and Dorothy Spezio (United States) SPITFIRE – Spitfire Helicopter Company Ltd (United States) SPORT RACER – Sport Racer Inc (United States) SPORTAVIA-PUTZER – Sportavia-Pützer GmbH u.Co.KG (Germany) SPRATT – George G.Spratt (United States) SPRING – W.Spring (Canada) SSH – Serwis Samolotow Historycznich (Poland) ST. CROIX – St. Croix Aircraft (United States) ST. JUST – St. Just Aviation Inc (Canada) STAMPE – Stampe & Renard (Belgium); Stampe & Vertongen (Belgium) STARCK – André Starck (France) STARFIRE – Starfire Aviation Inc (United States) STARK – Stark Flugzeugbau KG (Germany); Stark Iberica SA (Spain) STARKRAFT – Starkraft (United States) STARK-TREFETHEN – George Stark and Al Trefethen (United States) STAR-LITE – Star-Lite Aircraft (United States) STARPAC – Star of Phoenix Aircraft (United States) STATLER – William H.Statler (United States) STAUDACHER – Staudacher Aircraft Inc (United States) STEARMAN – Stearman Aircraft Company (United States) STEEN – Lamar Steen (United States) STEMME – Stemme Gmbh & Co KG (Germany) STEPHENS – C.L.Stephens (United States) STERN – René Stern (France) STERN-MALLICK – René Stern et Richard Mallick (France) STEWART (1) – Stewart Aircraft Corporation (United States) STEWART (2) – Donald Stewart (United States) STINSON – Stinson Aircraft Corporation (United States); Stinson Division of Consolidated Vultee Corporation (United States) STITS – Stits Aircraft (United States) STODDARD-HAMILTON – Stoddard-Hamilton Aircraft Inc (United States) STOLP – Louis A.Stolp (United States) STORCH AVIATION – Storch Aviation Australia Pty Ltd (Australia) STREAMLINE WELDING – Streamline Welding Inc (Canada) STRIPLIN – Striplin Aircraft Corporation (United States) STROJNIK – Prof. Alex Strojnik (United States) SUD – Sud-Aviation, Société Nationale de Constructions Aéronautiques (France) SUD-EST – Société Nationale de Constructions Aéronautiques du Sud-Est (France); Sud-Est Aviation