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

People

S4 (gamer) Gustav Magnusson (born 1 April 1992), better known as s4, is a Swedes, Swedish professional ''Dota 2'' player. As a member of Alliance, s4 won The International 2013. Professional career 2012: early career s4's ''Dota 2'' career started in ...

, Gustav Magnusson, Swedish ''Dota 2'' player *

S4 (military) A military staff or general staff (also referred to as army staff, navy staff, or air staff within the individual services) is a group of officers, enlisted, and civilian staff who serve the commander of a division or other large militar ...

, a logistics officer within military units

Places

County Route S4 (California) There are 34 routes assigned to the "S" zone of the California Route Marker Program, which designates county routes in California. The "S" zone includes county highways in Imperial County, California, Imperial, Orange County, California, Orange ...

, a road in San Diego, California

Science and mathematics

Mathematics

S4 algebra In abstract algebra, an interior algebra is a certain type of algebraic structure that encodes the idea of the topological interior of a set. Interior algebras are to topology and the modal logic S4 what Boolean algebras are to set theory and ord ...

, a variety of modal algebras, also called Interior algebra *

Tetrahedral symmetry image:tetrahedron.svg, 150px, A regular tetrahedron, an example of a solid with full tetrahedral symmetry A regular tetrahedron has 12 rotational (or orientation-preserving) symmetries, and a symmetry order of 24 including transformations that co ...

, the symmetric group S₄ * S4 (modal logic), a normal modal logic

Chemistry

* S4: Keep away from living quarters, a safety phrase in chemistry *

Tetrasulfur The element sulfur exists as many allotropes. In number of allotropes, sulfur is second only to Allotropes of carbon, carbon.#Greenwood, Greenwood, 652 In addition to the allotropes, each allotrope often exists in Polymorphism (materials science) ...

(S₄), an allotrope of sulfur *

Andarine Andarine (developmental code names GTx-007, S-4) is a selective androgen receptor modulator (SARM) which was developed by GTX, Inc for the treatment of conditions such as muscle wasting, osteoporosis, and benign prostatic hyperplasia (BPH), us ...

(S-4), a selective androgen receptor modulator and experimental drug

Biology

Fourth heart sound The fourth heart sound or S4 is an extra heart sound that occurs during late diastole, immediately before the normal two "lub-dub" heart sounds (S1 and S2). It occurs just after atrial contraction and immediately before the systolic S1 and is cau ...

, or S₄, an abnormal heart sound often indicative of congestive heart failure or cor pulmonale * Fourth

sacrum The sacrum (: sacra or sacrums), in human anatomy, is a 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 pelvic cavity, ...

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 (statistician), John Chambers and (in earlier versions) Rick Becker, Trevor Hastie, William S. Cleveland, William Cleveland and Allan Wilks of Bell Labs, Bell Laboratorie ...

version 4 *

Hibernation Hibernation is a state of minimal activity and metabolic reduction entered by some animal species. Hibernation is a seasonal heterothermy characterized by low body-temperature, slow breathing and heart-rate, and low metabolic rate. It is mos ...

a sleeping state in a computer *

SG2 Shareable (Fire Control) Software Suite (S4) The NATO Army Armaments Group (NAAG) Integrated Capability Group Indirect Fires (ICGIF), formerly Land Group 4, and their Sub Group 2 (SG2) on Surface to Surface Ballistics has created a widely used set of shareable fire control software using th ...

* 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 flags ...

, a mini version of the Samsung Galaxy S4 *

Samsung Galaxy Tab S4 The Samsung Galaxy Tab S4 is a tablet computer developed and produced by Samsung Electronics. It is the successor of the previous Galaxy Tab S3, and was announced alongside the cheaper Samsung Galaxy Tab A 10.5. History The Tab S4 was revea ...

, an Android tablet

Transportation

Routes

Austria

* S4, a

Carinthia S-Bahn The Carinthia S-Bahn () is a regional transport system in the Austrian state of Carinthia and East Tyrol. The system is operated by the ÖBB, the national railway company. History The Carinthia S-Bahn network was launched on 12 December 2 ...

line * S4, a

Salzburg S-Bahn The Salzburg S-Bahn is a large transport project in and around Salzburg in the Euroregion of Salzburg–Berchtesgadener Land–Traunstein (district), Traunstein, which crosses the border between Austria and Germany. Its S-Bahn network has been par ...

line that extends into Germany * S4, a

Tyrol S-Bahn The Tyrol S-Bahn, operated by ÖBB, provides regional rail services in metropolitan Innsbruck, Austria and its hinterlands in the States of Austria, state of Tyrol; and extended rail services into Italy and Germany. Current lines There are eig ...

line * S4, an

Upper Austria S-Bahn The Upper Austria S-Bahn () is an S-Bahn system that was introduced on 11 December 2016 in the Greater Linz area of Upper Austria. In the first step a clock-face timetable was implemented with exactly the same departure minutes and closure of cloc ...

line * S4, a

Vienna S-Bahn The Vienna S-Bahn is a suburban commuter rail network in Vienna, Austria. As opposed to the city-run urban metro network, the Vienna U-Bahn, it extends beyond the borders of the city, is operated by the Austrian Federal Railways, ÖBB (Austria ...

line * S4, a

Vorarlberg S-Bahn Vorarlberg S-Bahn () is a label for regional rail services in the westernmost Austrian States of Austria, state of Vorarlberg. The S-Bahn services also connect to stations in the Germany, German town of Lindau, the Switzerland, Swiss towns of S ...

line

Germany

S4 (Berlin) The S4 line number was used by the Berlin S-Bahn between December 1997 and June 2002. The line acted as a temporary route for the re-opened parts of the Berlin S-Bahn ring (''Ringbahn'' in German) until the complete ring was fully re-opened in Jun ...

, a Berlin S-Bahn line *

S4 (Munich) Line S4 is a line on the Munich S-Bahn network. It is operated by DB Regio Bayern. It runs from Geltendorf station to Ebersberg station via Pasing station, Pasing, central Munich, Munich East station, Munich East and Grafing station. The line i ...

, a Munich S-Bahn line *

S4 (Nuremberg) The S4 is an S-Bahn service in the German city of Nuremberg. It is one of the five services of the Nuremberg S-Bahn network. It was opened in 2010 and has 16 stations. The route is long and runs from Nürnberg Hauptbahnhof to Dombühl. Until 9 ...

, a Nuremberg S-Bahn line *

S4 (Rhine-Main S-Bahn) The S4 service of the S-Bahn Rhein-Main system bearing the KBS (German List of scheduled railway routes in Germany, scheduled railway route) number 645.4 Routes Kronberg Railway Homburg Railway City tunnel The city tunnel is an unde ...

, a Rhine-Main S-Bahn line *

S4 (Rhine-Ruhr S-Bahn) Line S 4 is an S-Bahn of the Rhine-Ruhr S-Bahn, running from to the Dortmund suburb of Dortmund-Lütgendortmund station, Dortmund-Lütgendortmund. It is operated by DB Regio on behalf of Verkehrsverbund Rhein-Ruhr. It is operated at 30-minute inte ...

, a Rhine-Ruhr S-Bahn line * S4, a

Bremen S-Bahn The Bremen S-Bahn () is an S-Bahn network in Germany, covering the Bremen/Oldenburg Metropolitan Region, from Bremerhaven in the north to Twistringen in the south and Bad Zwischenahn and Oldenburg (city), Oldenburg in the west. It has been in o ...

line * S4, a

Hanover S-Bahn The Hanover S-Bahn (in German: ''S-Bahn Hannover'') is an S-Bahn network operated by 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 the Hanover ...

line * S4, a

Karlsruhe Stadtbahn The Karlsruhe Stadtbahn is a German tram-train system combining Karlsruhe trams, 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 connec ...

, line * S4, a

Rhine-Neckar S-Bahn The Rhine-Neckar S-Bahn ''(S-Bahn RheinNeckar)'' forms the backbone of the urban rail transport network of the Rhine Neckar Area, including the cities of Mannheim, Heidelberg and Ludwigshafen. The S-Bahn operates over of route in the states of ...

line * S4, a planned

Rostock S-Bahn The Rostock S-Bahn () 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 (main station) to Wa ...

line canceled in 2012 * S4, a

Stuttgart S-Bahn The Stuttgart S-Bahn is a suburban railway system (S-Bahn) serving the Stuttgart Region, an urban agglomeration of around 2.7 million people, consisting of the city of Stuttgart and the adjacent districts of Esslingen, Böblingen, Ludwigsb ...

line

Switzerland

* S4 (St. Gallen S-Bahn), a St. Gallen S-Bahn line *

S4 (RER Vaud) The R4 is a railway service of RER Vaud that provides hourly service between and in the Swiss canton of Vaud. A limited number of trains continue from Bex to . On weekdays, a section of the train operates from to . Swiss Federal Railways ...

, a RER-Vaud S-Bahn line *

S4 (ZVV) The Sihltal railway line () is a railway line in the Switzerland, Swiss canton of Zürich, which connects the city of Zürich with the communities of the Sihl Valley. Passenger service on the line now forms part of the Zürich S-Bahn, branded a ...

, Zurich S-Bahn line

Other routes

* S4, a

Brussels Regional Express Network The Brussels S Train, also known as the Brussels Regional Express Network ( or RER; or GEN) is a suburban rail system in and around the Brussels-Capital Region of Belgium. It will offer fast connections and increased frequency within a radius ...

line in Belgium

Vehicles

Alco S-4 The ALCO S-2 and S-4 are diesel-electric locomotive, diesel electric switcher locomotives produced by American Locomotive Company, ALCO and Canadian licensee Montreal Locomotive Works (MLW). Powered by turbocharged, 6-cylinder ALCO 539 diesel ...

, a locomotive *

Audi S4 The Audi S4 is the high performance variant of Audi's compact executive car A4. The original Audi S4, built from 1991 until 1994, was a performance-oriented version of Audi's 100 saloon/sedan. All subsequent S4s since 1997 have been based on th ...

, a car *

Lancia Delta S4 The Lancia Delta S4 (also known by its Abarth project code ''SE038'') is a Group B rally car manufactured by Lancia. The Delta S4 competed in the World Rally Championship in 1985 and 1986, until Group B class was disbanded and the cars were eve ...

, a 1984 Group B rally car * Hydra Technologies Ehécatl, S4, a Mexican unmanned aerial vehicle *

Letov Š-4 The Letov Š-4 was a Czechoslovak single-bay, unstaggered biplane fighter and trainer in the 1920s. Production history The Š-4 was first created in 1922 as an intended successor to the SPAD S.VII and S.XIII, in service with the newly created ...

, a 1923 Czechoslovak aircraft *

Prussian S 4 The Prussian S 4's were German superheated express steam locomotives with the Prussian state railways, later grouped as DRG Class 13.5 in the Deutsche Reichsbahn. They were an evolutionary development of the Prussian S 3. The first locomotive wa ...

, an 1894 steam locomotives class *

Seibel S-4 The Seibel S-4 was a two-bladed, single-engine helicopter built by Seibel Helicopter. Designed by Charles Seibel, the S-4 was evaluated by the United States Army under the designation ''YH-24 Sky Hawk'', but would be rejected for service. The ...

, a 1951 helicopter * Supermarine S.4, a 1925 British seaplane * USS S-4 (SS-109), a 1919 US Navy submarine

Groups, companies, organizations

* S04, FC Schalke 04, a German professional sports club *

Shift4 Payments Shift4 Payments, Inc. is an American payment processing company based in Allentown, Pennsylvania. The company, founded in 1999 by the then 16-year-old Jared Isaacman, processes payments for over 200,000 businesses in the retail, hospitality, lei ...

, a U.S. payment processor *

SATA International SATA (Serial AT Attachment) is a computer bus interface that connects 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) standard t ...

(IATA airline designator "S4"), Azores Airlines

Other

S4 (classification) S4, SB3, SM4 are para-swimming classifications used for categorising swimmers based on their level of disability. Swimmers in this class have coordination problems affecting all four of their limbs, or have movement in their arms, some trunk func ...

, a disability swimming classification *

Form S-4 Form S-4 is a form filed with the U.S. Securities and Exchange Commission relating to a business combination or exchange offer. This filing contains details relating to share distribution, amounts, terms, and other information relating to any or a ...

, 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)

People

Places

Science and mathematics

Mathematics

Chemistry

Biology

Technology

Transportation

Routes

Austria

Germany

Switzerland

Other routes

Vehicles

Groups, companies, organizations

Other

See also