S1, S01, S.I, S-1, S.1, Š-1 or S 1 may refer to:
Biology and chemistry S1 nuclease, an enzyme that digests singled-stranded DNA and RNA S1: Keep locked up, a safety phrase in chemistry Primary somatosensory cortex, also known as S1 Tegafur/gimeracil/oteracil, also known as S-1, a chemotherapy medication
Entertainment S1 (Indian TV channel), a Hindi-language channel S1 (Swiss TV channel), a German-language channel S1 (producer), a hip hop producer, member of the group Strange Fruit Project S1 No. 1 Style, a Japanese adult video company Gibson S-1, a guitar made by the Gibson Guitar Corporation A member of the S1W (group) that later became part of the music group Public Enemy.
Government Bill S-1, a pro forma bill in Canadian Parliament Form S-1, a U.S. Securities and Exchange Commission filing S-1 Executive Committee, a United States government entity during World War II S1 (military), an administrative position within military units
Technology ACPI S1 power state, in computing; see Apple S1, integrated computer used in the Apple Watch Canon PowerShot S1 IS, a 2004 3.2 megapixel digital camera FinePix S1 Pro, a 2000 interchangeable lens digital single-lens reflex camera by Fujifilm Nikon Coolpix S1, a digital camera Nikon 1 S1, mirrorless interchangeable lens camera S1 Corporation, an American software development company S1 Core, a microprocessor-core S1 MP3 Player Samsung Galaxy S (2010 smartphone) Sendo S1, a Sendo mobile phone model Siemens S1, a Siemens mobile phone Sony BDP-S1, a first generation Blu-ray Disc (BD) Player S1, an EPC in an LTE/4G network
Transportation Routes Austria S1 (Vienna), an S-Bahn line S1, a line of the Carinthia S-Bahn S1, a line of the Salzburg S-Bahn S1, a line of the Styria S-Bahn S1, a line of the Tyrol S-Bahn S1, a line of the Upper Austria S-Bahn S1, a line of the Vorarlberg S-Bahn
China Line S1 (Beijing Subway) Line S1 (Guiyang Metro) Line S1 (Hefei Metro) Line S1 (Nanjing Metro) Line S1 (Taizhou Rail Transit) Line S1 (Wenzhou Rail Transit) Line S1 (Wuxi Metro) S1 Yingbin Expressway in Shanghai
Germany S1 (Berlin), an S-Bahn line S1 (Dresden), an S-Bahn line S1 (Munich), an S-Bahn line S1 (Nuremberg), an S-Bahn line S1 (Rhine-Main S-Bahn), an S-Bahn line S1 (Rhine-Ruhr S-Bahn), an S-Bahn line S1 (Stuttgart), an S-Bahn line S1, a Breisgau S-Bahn line S1, a planned Bremen S-Bahn line S1, a Hamburg S-Bahn line S1, a Hanover S-Bahn line S1, a RheinNeckar S-Bahn line S1, a Rostock S-Bahn line S1, a Stadtbahn Karlsruhe line
Italy S1a, a Bologna metropolitan railway service S1b, a Bologna metropolitan railway service Line S1 (Milan suburban railway service)
Switzerland S1 (Bern S-Bahn), an S-Bahn line in the canton of Bern S1 (RER Vaud), an S-Bahn line in the canton of Vaud S1 (St. Gallen S-Bahn), an S-Bahn line in the cantons of Schaffhausen, St. Gallen, Thurgau and Zurich S1 (ZVV), now subsumed by S24, a Zurich S-Bahn line S1, a line of the Basel S-Bahn S1, a line of the Chur S-Bahn S1, a line of the Lucerne S-Bahn S1, a line of the Zug Stadtbahn
United States County Route S1 (California) S1 (Long Island bus)
Other countries S-1 Strategic Highway, Pakistan Expressway S1 (Poland) FGC line S1, a suburban train line in Barcelona Province Stagecoach Gold bus route S1, in Oxfordshire, England, UK
Vehicles 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 S-1, a 1920 Czechoslovak surveillance aircraft Loening S-1, a United States Army Air Service seaplane Loughead S-1 Sport 1920 US biplane Martinsyde S.1, a 1914 British biplane aircraft Pantsir-S1, a Russian anti-aircraft system Pitts S-1 aerobatic biplane S-1 Loening, a United States Army Air Service seaplane SSBS S1, a French experimental rocket Swift S-1, a 1991 Polish single seat aerobatic glider
Cars AS S1, a 1927 car manufactured in Poland Audi S1, performance variant of Audi A1 Invicta S1, a 2004 sports car Leapmotor S01, an all-electric car S1 Scout Car, an armoured car built in Australia during the Second World War Superformance S1 Roadster, a Lotus Seven Type replicar produced in South Africa 2001–2004 Saleen S1, an American sports car
Other vehicles Alco S-1, a locomotive PRR S1, a duplex locomotive developed by the Pennsylvania Railroad LNER Class S1, a class of British steam locomotives NER Class S1, a class of British steam locomotives USS S-1 (SS-105), a 1918 United States Navy experimental submarine
Other uses S1 (classification), a disability swimming classification S postcode area covering Sheffield City Centre in human anatomy: the first sacral vertebra the sacral spinal nerve 1 of the vertebral column the primary somatosensory cortex in the brain Senior 1, the First Year in the Scottish secondary education system Season (television) or series one Comet Ikeya–Seki, C/1965 S1 Upplands regemente (signal), a 1902 Signal Regiment of the Swedish Armed Forces
With superscripts and subscripts S1 may refer to: S1 (heart sound), a heart sound in cardiac auscultation S1 may refer to: S1, the n-sphere in two dimensions i.e. a circle Inverse second (s−1), a unit of frequency
S01 S01 may refer to: Akai S01, an Akai synthesizer ATC code S01 Ophthalmologicals, a subgroup of the Anatomical Therapeutic Chemical Classification System HMS Porpoise (S01), a 1956 Porpoise-class submarine of the Royal Navy MULTI-S01, an encryption algorithm based on a pseudorandom number generator
See also 1S (disambiguation)