{{wiktionary|ST|St|st|.st|s.t.}} '''ST''', '''St''', or '''St.''' may refer to:
{{TOC right}}
== Arts and entertainment == * Stanza, in poetry * Suicidal Tendencies, an American heavy metal/hardcore punk band * ''Star Trek'', a science-fiction media franchise * Summa Theologica, a compendium of Catholic philosophy and theology by St. Thomas Aquinas * St or St., abbreviation of "State", especially in the name of a college or university (e.g. Penn St.) * "S.T. the Space Traveler", a 1990 episode of ''Alvin and the Chipmunks'' (1983) *''Stranger Things'', a Netflix sci-fi horror series
== Businesses and organizations == ===Transportation=== * ST, the IATA airline designator for German airline Germania (airline) * ST, the railroad reporting mark for American railroad Springfield Terminal Railway (Vermont) * Sound Transit, a shortened form of Central Puget Sound Regional Transit Authority in the U.S. state of Washington * State Transport, a shortened form of Maharashtra State Road Transport Corporation of India * Suffolk Transit, a shortened form of Suffolk County Transit, the bus system serving Suffolk County, New York, U.S. * Stouffville line (ST), of the GO Transit rail network in Ontario, Canada * Sudan (aircraft registration prefix ST)
===Other businesses and organizations=== * Statstjänstemannaförbundet, or Swedish Union of Civil Servants, a trade union * STMicroelectronics, a worldwide manufacturer of semiconductors * ST Engineering, a global technology, defense, and engineering group headquartered in Singapore
==Geography== * São Tomé and Príncipe (ISO 3166-1 country code ST) ** .st, Internet country code top-level domain for São Tomé and Príncipe * Saxony-Anhalt, a state of Germany * Split, Croatia (vehicle plate code ST) * Stoke-on-Trent postcode area, United Kingdom * St or St., abbreviation of Saint * St or St., abbreviation of Street * St or St., abbreviation of Strait
== Language and typography == * {{char|st}}, the ISO 639-1 language code for the Sesotho language * {{char|ſt}} or {{char|st}}, typographic ligatures * Standard Theory in generative grammar
==Science and technology== ===Computing=== * ST connector, a type of optical fiber connector * Atari ST, a personal computer * Prefix of hard disk drives made by Seagate Technology, e.g. ST-506 * Internet Stream Protocol, an experimental Internet protocol * Structured text, a high-level programming language that syntactically resembles Pascal and is designed for programmable logic controllers (PLC) * .st, the Internet country code top-level domain (ccTLD) for São Tomé and Príncipe
===Mathematics=== * Standard part function, a term used in non-standard analysis
===Physics=== * Stanton number St, used in physics * Strouhal number St, used in fluid mechanics * String theory
=== Units of measurement === * Stokes (unit) (St), a CGS unit of kinematic viscosity * Stone (weight) (st.), a unit of mass used in the British Isles and other countries
===Medicine=== * ST segment, the part of an electrocardiogram connecting the QRS complex and the T wave * Sulfotransferase, enzymes that catalyze the transfer of a sulfo group * Heat-stable enterotoxin, secretory peptides produced by some bacterial strains, such as enterotoxigenic ''Escherichia coli''
===Technology=== * Spherical tokamak, a type of fusion power device sometimes referred to as a spherical torus and often shortened to ST
==Fictional characters== * St. Claire, a TV presenter, from the film ''Who Is Killing the Great Chefs of Europe?'', portrayed by Peter Sallis
== Other uses == * Scheduled Tribes, in India * Striker (association football), a position in association football * St (British English), a saint, especially in Christianity * St. (American English), a saint, especially in Christianity * ST, the ship prefix for a steam tug or steam trawler * ST, a type of London bus * ST, a court-ordered pseudonym used during a British court case; see Sudiksha Thirumalesh case * -st, a suffix for an ordinal number, such as 1{{sup|st}} or 21{{sup|st}} * s.t., abbreviation of ''sine tempore'', a Latin term used to indicate that a lecture will begin at the exact time; see academic quarter (class timing)
==See also== * ΣΤ (disambiguation) (sigma tau) * STST (disambiguation) * STFC (disambiguation) for uses of ST F.C.
{{disambiguation}}