Look up ѕ, Տ, Ꮪ, or Appendix:Variations of "s" in Wiktionary, the free dictionary.

S is the nineteenth letter of the English alphabet.

S may also refer to:

History

• an Anglo-Saxon charter's number in Peter Sawyer's, catalogue

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
• -s, a suffix added to some English surnames, originally meaning "son of"
• s, the International Phonetic Alphabet symbol for a voiceless alveolar sibilant sound
• S, the subject of an intransitive verb
• Ѕ, the Cyrillic letter Dze

Transportation

• 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.

Mathematics and logic

• Integral symbol (∫), used in mathematics to denote integrals and antiderivatives
• S combinator in combinatory logic
• Sphere
• s(n), the aliquot sum of an integer n

Physics and chemistry

• Sulfur, symbol S, a chemical element
• s, for second, the SI unit of time
• 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

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

Computing

• 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

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 by John Updike
• S (novel series), a 2005-2006 light novel series
• "S" Is for Silence, the nineteenth novel in Sue Grafton's "Alphabet mystery" series, published in 2005

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 (EP), a 2001 EP by Japanese musical duo NaNa
• Numbering of Franz Liszt's works according to Humphrey Searle's catalogue

Television

• S, the production code for the 1965 Doctor Who serial The Time Meddler

Comics

• S, the protagonist of Heavy Liquid

Automobiles

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, 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

Other uses

• S by Shakira, the first woman's fragrance by Colombian singer songwriter Shakira
• Safety (gridiron football position)
• South on a map or compass, one of the four cardinal directions
• s, the SI symbol for second
• Shilling (British coin)
• Old Israeli Shekel, denominated as S
• S postcode area, a postcode area including Sheffield, England
• A party label for the Swedish Social Democratic Party
• Strike (baseball)
• S band, a band of radio which ranges from 2 to 4 GHz
• Sierra, the military time zone code for UTC−06:00
• Cool S, a graffiti sign