S1
S1, S01, S.I, S-1, S.1, Š-1 or S 1 may refer to :
In the military
S-1 Loening, a United States Army Air Service seaplane
S1 (military), an administrative position within military units
S1 Scout Car, an armoured car built in Australia during the Second World War
S-1 Uranium Committee, a United States government codename during World War II for the Manhattan atomic bomb project
USS S-1 (SS-105), a 1918 United States Navy experimental submarine
Pantsir-S1, a Russian anti-aircraft system
SSBS S1, a French experimental rocket
Transport
Automobiles
S1 Scout Car, an armoured car built in Australia during the Second World War
Invicta S1, a 2004 sport car
Superformance S1 Roadster, a Lotus Seven Type replicar produced in South Africa between 2001 and 2004, 56 vehicles were produced
Aircraft
Blackburn Buccaneer S.1 jet naval strike aircraft
Focke-Wulf S 1, a German Focke-Wulf aircraft
Fokker S.I, a 1919 Dutch primary trainer aircraft
Hopfner S-1, a Hopfner aircraft
Letov Š-1, a 1920 Czechoslovak single-engined, two-seat biplane surveillance aircraft
