S is the nineteenth letter of the English alphabet.
S may also refer to:
s, seconds, in an amount of time
Language and linguistics Long s (ſ), a form of the lower-case letter s formerly used where "s" occurred in the middle or at the beginning of a word , the International Phonetic Alphabet symbol for a voiceless alveolar sibilant sound S, the subject of an intransitive verb Ѕ, the Cyrillic letter Dze Տ, the Armenian letter tyun Ⴝ, the Georgian Asomtavruli letter ch'ari
Transportation and places
South, a cardinal direction, usually shown at the bottom of a map or compass S postcode area, England, centered around Sheffield S, the designation letter for Sierra Time Zone, the military time zone for UTC−06:00
Trains S (New York City Subway service), one of the three services: Franklin Avenue Shuttle 42nd Street Shuttle (also called the Grand Central/Times Square Shuttle) (internally referred to as the 0) Rockaway Park Shuttle (also called Rockaway Shuttle) (internally referred to as the H) Toei Shinjuku Line, a subway service operated by the Tokyo Metropolitan Bureau of Transportation (Toei), labeled Sennichimae Line, a subway service operated by the Osaka Metro, labeled , the official West Japan Railway Company service symbol for the Kansai Airport Line Shrirangapattana railway station (Indian Railways station code: S), Karnataka, India Karjat railway station (Mumbai Suburban Railway station code: S), Maharastra, India
Automobiles
Bojonegoro, Mojokerto, Tuban, Lamongan and Jombang (vehicle registration prefix S)
Production models Aion S, a Chinese electric compact executive sedan Jaguar S-Type (1963), a British sports saloon Jaguar S-Type (1999), a British executive saloon Mercedes-Benz S-Class, a German full-size luxury car series Mini Cooper S, a British hot hatch Neta S, a Chinese electric sedan Tesla Model S, an American electric executive sedan
Prototypes and concepts Sony Vision-S, a Japanese mid-size electric concept sedan
Series and trims Acura Type-S, a range of Japanese performance vehicles Audi S, a range of German performance vehicles Honda S series, series of Japanese sports cars Jaguar S, a range of British performance vehicles Saviem S, a range of French medium-duty cab-over trucks
Mathematics and logic Integral symbol (∫), used in mathematics to denote integrals and antiderivatives S combinator in combinatory logic Sphere S (set theory), an axiomatic set theory s(n), the aliquot sum of an integer n
Science and technology
Physics, chemistry, and telecommunications Sulfur, symbol S, a chemical element S, the symbol for entropy S, a non-SI unit used to designate molecule size named after the Svedberg sedimentation coefficient (S), a label that denotes one of two chiral center configurations in the R/S system s, one of the Mandelstam variables, the square of the invariant mass Siemens (unit), the SI derived unit of electric conductance S-block of the periodic table, which includes alkali metals, alkaline earth metals, and hydrogen and helium Spin (physics) s, an abbreviation for solid S-matrix for how a particle physics system works under a scattering process. This is a distinct concept from scattering parameters, below, which may also be referred to as an S-matrix in the context of radio frequency transmissions. Scattering parameters as S-matrix or S-parameters for how an electrical network behaves at some frequency, used e.g. with radio transmission S band, a band of radio which ranges from 2 to 4 GHz
Biology and medicine Serine, a standard amino acid abbreviated as Ser or S ATC code S Sensory organs, a section of the Anatomical Therapeutic Chemical Classification System S phase or synthesis phase, a period in the cell cycle during interphase
Electronics and computing Nikon S-mount, type of interchangeable lens mount used by a series of Nikon 35 mm rangefinder cameras Nikon S, a 34 mm rangefinder film camera Nikon Pronea S, an APS film camera made by Nikon Samsung Galaxy S (2010 smartphone), the first flagship smartphone of the Samsung Galaxy S series S (programming language), an environment for statistical computing and graphics <s>, the opening tag for the HTML element denoting information that is "no longer accurate or no longer relevant", usually rendered as strike-through text S record or SREC, a file format with an ASCII representation of Binary data
People S, the pen name of Percy Bysshe Shelley "S.", the nickname for Solomon Shereshevsky (1886-1958), a Russian journalist, mnemonist, and synesthete notable for his unusual memory abilities
Arts and entertainment Books S. (Dorst novel), written by Doug Dorst based on story by J.J. Abrams S. (Updike novel), part of The Scarlet Letter trilogy S (novel series), a 2005-2006 light novel series
Music S, the stage name of singer-songwriter and guitarist Jenn Champion S (group), a short-lived South Korean music group active in 2003 and 2014 S, a 2001 EP by Japanese musical duo NaNa S (EP), a 2013 EP by American singer SZA Numbering of Franz Liszt's works according to Humphrey Searle's catalogue "S" (song), by Japanese band Sid
Television S, the production code for the 1965 Doctor Who serial The Time Meddler
Comics S, the protagonist of Heavy Liquid
Sports
Safety (gridiron football position), a player role in American and Canadian football, a kind of defensive back Strike (baseball), when the ball passes through the batter's strike zone
Currency
s, shilling (British coin), a denomination of sterling coinage worth 0.05 £, or, pre-decimal, 12 d S, old Israeli shekel, used 1980–1985
Other uses S by Shakira, the first woman's fragrance by Colombian singer songwriter Shakira A party label for the Swedish Social Democratic Party Cool S, a graffiti sign S, the prefix before a "Sawyer number" denoting an entry in Anglo-Saxon Charters: an Annotated List and Bibliography
See also 's (disambiguation) -s (disambiguation) S class (disambiguation) S Curve (disambiguation) Split S