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Meanings and definitions for S4
What does S4 stand for? What does S4 mean?
- Fourth heart sound, or S4, an abnormal heart sound often indicative of congestive heart failure or cor pulmonale
- Fourth sacrum of the vertebral column in human anatomy
- Sacral spinal nerve 4, a spinal nerve of the sacral segment
- S4: Keep away from living quarters, a safety phrase in chemistry
- Tetrasulfur (S4), an allotrope of sulfur
- S (programming language) version 4
- Hibernation a sleeping state in a computer
- SG2 Shareable (Fire Control) Software Suite (S4)
- Nikon Coolpix S4, a camera
- Samsung Galaxy S4, a smartphone
- Samsung Galaxy S4 Mini, a mini version of the Samsung Galaxy S4
- S4 (Berlin), a S-Bahn line
- S4 (Munich), a S-Bahn line in Munich
- S4 (ZVV) line S4, a line of the S-Bahn Zürich in Switzerland
- Bremen S-Bahn line S4
- Hanover S-Bahn line S4
- Rhine-Main S-Bahn line S4
- RheinNeckar S-Bahn line S4
- Rhein-Ruhr S-Bahn line S4
- Rostock S-Bahn line S4, a 2010-planned future line
- Stadtbahn Karlsruhe line S4
- Stuttgart S-Bahn line S4
- S4, a line of the Brussels Regional Express Network
- Alco S-4, a locomotive
- Audi S4, a car
- Lancia Delta S4, a 1984 Group B rally car
- Hydra Technologies Ehécatl, 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), a 1919 US Navy submarine
- S04, FC Schalke 04, a German professional sports club
- S4 algebra, a variety of modal algebras, also called Interior algebra
- S4 (Dota player), Gustav Magnusson, Swedish Dota 2 player
- S4 (military), a logistics officer within military units
- County Route S4 (California), a road in San Diego, California
- Form S-4, a form required by the Securities and Exchange Commission to declare mergers and acquisitions
- SATA International (IATA airline designator), Azores Airlines
- Symmetric group S4 (S4), an abstract mathematical group
- S4, a normal modal logic
- S4 standard, a set of standards for model railways (P4 gauge)
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