S20

S20 may refer to:

Aviation

• Letov Š-20, a Czechoslovak fighter
• Rans S-20 Raven, an American light-sport aircraft
• SABCA S-20, a Belgian aircraft
• Short S.20 Mercury, a British parasite seaplane
• Sikorsky S-20, a Russian biplane fighter
• SPAD S.XX, later the Blériot-SPAD S.20, a French fighter

Electronics

• Canon PowerShot S20, a digital camera
• Chrome S20 series, a graphics accelerator
• Samsung Galaxy S20, a series of smartphones
• Akai S20, an Akai synthesizer

Rail and transit

Lines

• S20 (Long Island bus), in Suffolk County, New York, United States
• S20 (Munich), in Germany
• S20 (RER Fribourg), in Switzerland
• S20 (TILO), in Ticino, Switzerland
• S20 (ZVV), of the Zürich S-Bahn, Switzerland

Stations

• Kamisawa Station (Nagoya), in Midori-ku, Nagoya, Aichi, Japan
• Imazato Station (Osaka Metro), in Japan
• Shikaribetsu Station, in Niki, Yoichi District, Hokkaidō, Japan
• Shinozaki Station, in Edogawa, Tokyo, Japan

Roads

• S20 Shanghai Outer Ring Expressway, China
• County Route S20 (California), United States

Submarines

• Brazilian submarine Humaitá (S20)
• HMS Opportune (S20), a submarine of the Royal Navy
• INS Kursura (S20), a submarine of the Indian Navy
• Type S20 submarine, an export version of China's Type 039A submarine
• USS S-20 (SS-125), a submarine of the United States Navy

Homoglyphic errors for S2O

• S₂O, disulfur monoxide
• S2O, Subscribe to Open, one of dozens of business models for open access

Other uses

• 40S ribosomal protein S20
• British NVC community S20, a natural habitat of swamps and tall-herb fens in the British National Vegetation Classification system
• Nissan S20 engine, an automobile engine
• S20: When using do not eat or drink, a safety phrase
• Sako S20, a Finnish bolt-action rifle
• Toyota Crown (S20), a luxury sedan
• Venda language
• S20, a postcode district in Sheffield, England