S1

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
 * 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

China

 * Line S1 (Beijing Subway)
 * Line S1 (Nanjing Metro)
 * Line S1 (Wenzhou Rail Transit)
 * 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
 * a planned Bremen S-Bahn line
 * a Hamburg S-Bahn line
 * a Hanover S-Bahn line
 * a RheinNeckar S-Bahn line
 * a Rostock S-Bahn line
 * a Stadtbahn Karlsruhe line

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 canton of St. Gallen
 * S1 (ZVV), now subsumed by S24, a Zürich S-Bahn line

United States

 * County Route S1 (California)
 * S1 (Long Island bus)

Other countries

 * S1 (Vienna), an S-Bahn line in Austria
 * Line S1 (Milan suburban railway service), Italy
 * S-1 Strategic Highway, Pakistan
 * Expressway S1 (Poland)
 * FGC line S1, a suburban train line in Barcelona Province, Spain
 * Stagecoach Gold bus route S1, in Oxfordshire, England, UK

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 may refer to :
 * S1 (heart sound), a heart sound in cardiac auscultation
 * S1, the n-sphere in two dimensions i.e. a circle
 * Inverse second (s&minus;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