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S4, S 4, Š-4, S.4 or S-4 may refer to:


People

* S4 (Dota player), Gustav Magnusson, Swedish ''Dota 2'' player * S4 (military), a logistics officer within military units


Places

* County Route S4 (California), a road in San Diego, California


Science and mathematics


Mathematics

* S4 algebra, a variety of modal algebras, also called Interior algebra * Symmetric group S4 (S4), an abstract mathematical group * S4, a normal modal logic


Chemistry

* S4: Keep away from living quarters, a safety phrase in chemistry * Tetrasulfur (S4), an allotrope of sulfur


Biology

* Fourth heart sound, or S4, an abnormal heart sound often indicative of congestive heart failure or cor pulmonale * Fourth
sacrum The sacrum (plural: ''sacra'' or ''sacrums''), in human anatomy, is a large, triangular bone at the base of the spine that forms by the fusing of the sacral vertebrae (S1S5) between ages 18 and 30. The sacrum situates at the upper, back part ...
of the vertebral column in human anatomy *
Sacral spinal nerve 4 The sacral spinal nerve 4 (S4) is a spinal nerve of the sacral segment.American Medical Association
, a spinal nerve of the sacral segment


Technology

*
S (programming language) S is a statistical programming language developed primarily by John Chambers and (in earlier versions) Rick Becker and Allan Wilks of Bell Laboratories. The aim of the language, as expressed by John Chambers, is "to turn ideas into software, qui ...
version 4 * Hibernation a sleeping state in a computer * SG2 Shareable (Fire Control) Software Suite (S4) * Nikon Coolpix S4, a camera *
Samsung Galaxy S4 The Samsung Galaxy S4 is an Android smartphone produced by Samsung Electronics as the fourth smartphone of the Samsung Galaxy S series and was first shown publicly on March 14, 2013, at Samsung Mobile Unpacked in New York City. It is the succes ...
, a smartphone *
Samsung Galaxy S4 Mini The Samsung Galaxy S4 Mini (stylized as Samsung GALAXY S4 mini) is an Android smartphone developed by the Korean manufacturer Samsung Electronics. Announced on May 31, 2013 and released in July 2013, the S4 Mini is a mid-range model of its flagsh ...
, a mini version of the Samsung Galaxy S4 * Samsung Galaxy Tab S4, an Android tablet


Transportation


Routes

* S4 (Berlin), an S-Bahn line * S4 (Munich), an S-Bahn line * S4 (Nuremberg), an S-Bahn line * S4 (Rhine-Main S-Bahn), an S-Bahn line * S4 (Rhine-Ruhr S-Bahn), an S-Bahn line *
S4 (St. Gallen S-Bahn) The S4 is a railway service of the St. Gallen S-Bahn that provides hourly service over a circular route (german: Ringzug) that includes , , and , in the canton of St. Gallen. Südostbahn, a private company primarily owned by the federal governme ...
, an S-Bahn line in Switzerland * S4 (RER Vaud), an S-Bahn line in Switzerland * S4 (ZVV) line S4, a line of the S-Bahn Zürich in Switzerland * Bremen S-Bahn line S4 *
Hanover S-Bahn The Hanover S-Bahn (in German: ''S-Bahn Hannover'') is an S-Bahn network operated by DB Regio and Transdev Hannover in the area of Hanover in the German state capital of Lower Saxony. It went operational shortly before Expo 2000 and is focused on ...
line S4 * Rhine-Neckar S-Bahn line S4 *
Rostock S-Bahn The Rostock S-Bahn (german: S-Bahn Rostock) is a S-Bahn (suburban railway) network in Rostock in the German state of Mecklenburg-Vorpommern. It consists of three lines with a total length of about 90 km. Line S1 runs from Rostock Hauptbahnhof ...
line S4, a 2010-planned future line *
Stadtbahn Karlsruhe The Karlsruhe Stadtbahn is a German tram-train system combining tram lines in the city of Karlsruhe with railway lines in the surrounding countryside, serving the entire region of the middle upper Rhine valley and creating connections to neighb ...
line S4 * Stuttgart S-Bahn line S4 * S4, a line of the Brussels Regional Express Network


Vehicles

* Alco S-4, a locomotive * Audi S4, a car * Lancia Delta S4, a 1984 Group B rally car *
Hydra Technologies Ehécatl The S4 Ehécatl is an unmanned aerial vehicle developed and manufactured by Hydra Technologies of Mexico which, except for its infrared thermal sensor system, is the first of its type to be completely designed and manufactured in Mexico. It is nam ...
, S4, a Mexican unmanned aerial vehicle * Letov Š-4, a 1923 Czechoslovak aircraft * Prussian S 4, an 1894 steam locomotives class * Seibel S-4, a 1951 helicopter * Supermarine S.4, a 1925 British seaplane *
USS S-4 (SS-109) USS ''S-4'' (SS-109) was an S-class submarine of the United States Navy. In 1927, she was sunk by being accidentally rammed by a United States Coast Guard destroyer with the loss of all hands but was raised and restored to service until stric ...
, a 1919 US Navy submarine


Groups, companies, organizations

*
S04 Fußballclub Gelsenkirchen-Schalke 04 e. V., commonly known as FC Schalke 04 (), Schalke 04 (), or abbreviated as S04 (), is a Professionalism in association football, professional German association football, football and multi-sports club ori ...
, FC Schalke 04, a German professional sports club * Shift4 Payments, a U.S. payment processor *
SATA International SATA (Serial AT Attachment) is a computer bus interface that connects host adapter, host bus adapters to mass storage devices such as hard disk drives, optical drives, and solid-state drives. Serial ATA succeeded the earlier Parallel ATA (PATA) ...
(IATA airline designator "S4"), Azores Airlines


Other

* S4 (classification), a disability swimming classification *
Form S-4 Form S-4 is a form filed with the U.S. Securities and Exchange Commission The U.S. Securities and Exchange Commission (SEC) is an independent agency of the United States federal government, created in the aftermath of the Wall Street Crash o ...
, a form required by the Securities and Exchange Commission to declare mergers and acquisitions * S4 standard, a set of standards for model railways (
P4 gauge __NOTOC__ Protofour or P4 is a set of standards for model railways allowing construction of models to a scale of 4 mm to 1 foot (1:76.2), the predominant scale of model railways of the British prototype. For historical reasons almost all manuf ...
)


See also

* *
SSSS (disambiguation) SSSS may refer to: Arts, entertainment, and media *'' Ssss'', music album by duo VCMG, Vince Clarke and Martin Gore, released in 2012 * ''Superhuman Samurai Syber-Squad'', US TV series * '' SSSS.Gridman'', anime series * ''Stand Still, Stay Silent' ...
* 4S (disambiguation) * S (disambiguation) * 4 (disambiguation) {{Letter-NumberCombDisambig