ST, St, or St. may refer to:

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

Businesses and organizations

Transportation

* Germania (airline) (IATA airline designator ST) * Maharashtra State Road Transport Corporation, abbreviated as State Transport * Sound Transit, Central Puget Sound Regional Transit Authority, Washington state, US * Springfield Terminal Railway (Vermont) (railroad reporting mark ST) *

Suffolk County Transit Suffolk County Transit is the provider of bus services in Suffolk County, New York on Long Island and is an agency of the Suffolk County government. It was founded in 1980 as a county-run oversight and funding agency for a group of private con ...

, or Suffolk Transit, the bus system serving Suffolk County, New York

Other businesses and organizations

Statstjänstemannaförbundet The Swedish Union of Civil Servants (ST) is a trade union A trade union (labor union in American English), often simply referred to as a union, is an organization of workers intent on "maintaining or improving the conditions of their em ...

, or Swedish Union of Civil Servants, a trade union *

The Secret Team ''The Secret Team: The CIA and Its Allies in Control of the United States and the World'' is a book by L. Fletcher Prouty, a former colonel in the US Air Force, first published by Prentice-Hall in 1973. Publication history After initial publicati ...

, an alleged covert alliance between the CIA and American industry * STMicroelectronics, a worldwide manufacturer of semiconductors

Geography

São Tomé and Príncipe São Tomé and Príncipe (; pt, São Tomé e Príncipe (); English: " Saint Thomas and Prince"), officially the Democratic Republic of São Tomé and Príncipe ( pt, República Democrática de São Tomé e Príncipe), is a Portuguese-speaking i ...

(ISO 3166-1 country code ST) **

.st .st is the Internet country code top-level domain (ccTLD) for São Tomé and Príncipe. The code is marketed worldwide as an abbreviation for various entities. Second-level domains Registrations are taken directly at the second level, but som ...

, 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 A street is a public thoroughfare in a built environment. It is a public parcel of land adjoining buildings in an urban context, on which people may freely assemble, interact, and move about. A street can be as simple as a level patch of d ...

* St or St., abbreviation of Strait

Language and typography

* Sesotho language (ISO 639-1 language code "st") *

ﬅ ST, St, or St. may refer to: 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 an ...

, or st, a typographic ligature * Standard Theory in

generative grammar Generative grammar, or generativism , is a linguistic theory that regards linguistics as the study of a hypothesised innate grammatical structure. It is a biological or biologistic modification of earlier structuralist theories of linguistic ...

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 The Internet Stream Protocol (ST) is a family of experimental protocols first defined in Internet Experiment Note IEN-119 in 1979, and later substantially revised in RFC 1190 (ST-II) and RFC 1819 (ST2+). The protocol uses the version number 5 in ...

, an experimental Internet protocol * Structured text, a high-level programming language that syntactically resembles Pascal and is designed for programmable logic controllers (PLC) *

, the Internet country code top-level domain (ccTLD) for São Tomé and Príncipe * St (terminal emulator), minimalist terminal emulator by suckless.org

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''

Other uses

* -st, a suffix for an ordinal number, such as 1 or 21 * Saint (St or St.), especially in Christianity * Scheduled Tribes, in India * Ship prefix for a steam tug * Sine tempore (s.t.), Latin term indicating that a lecture will begin at the exact time; see

Academic quarter (class timing) An academic quarter (localized into various languages in the countries where it is practised) is the quarter-hour (15 minute) discrepancy between the defined start time for a lecture or lesson ("per schema") and the actual starting time, at some u ...

* Striker (association football), a position in association football * ST, a type of London bus