S50

S50 may refer to:

Automobiles

 * BMW S50, an automobile engine
 * Changan Ruixing S50, a Chinese MPV
 * Daihatsu New Line (S50), a Japanese pickup truck
 * Forthing Jingyi S50, a Chinese sedan
 * Levdeo S50, a Chinese SUV
 * Prince Skyline (S50), a Japanese sedan
 * Suzuki Boulevard S50 a Japanese motorcycle
 * Toyota Crown (S50), a Japanese luxury car
 * Weiwang S50, a Chinese SUV

Aviation

 * Auburn Municipal Airport (Washington), in King County, Washington, United States
 * Blériot-SPAD S.50, a French biplane airliner
 * Letov Š-50, a prototype Czechoslovak military aircraft
 * SIAI S.50, an Italian biplane fighter
 * Sikorsky S-50, an American helicopter

Electronics

 * Canon PowerShot S50, a digital camera
 * Cat S50, a mobile phone
 * Nikon Coolpix S50, a digital camera
 * Pentax Optio S50, a digital camera
 * Roland S-50, a sampling keyboard
 * Sirius S50, a satellite radio receiver
 * ThinkCentre S50, a personal computer

Naval vessels

 * HMS Courageous (S50), a submarine of the Royal Navy
 * SMS S50, a torpedo boat of the Imperial German Navy
 * USS S-50 (SS-161), a submarine of the United States Navy

Other uses

 * S-50 (Manhattan Project), a uranium enrichment effort
 * S50 (RER Fribourg), a rail line in Fribourg, Switzerland
 * S50 (TILO), a rail service between Ticino, Switzerland and Lombardy, Italy
 * 5th Ring Road, an expressway in Beijing, China
 * Expressway S50 (Poland)
 * S50: Do not mix with ... (to be specified by the manufacturer), a safety phrase
 * Toyota S50, a Toyota S transmission