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 The Maharashtra State Road Transport Corporation abbreviated as (MSRTC, or simply ST), is the state run bus service of Maharashtra, India which serves routes to towns and cities within Maharashtra as well as to its adjoining states. It has a flee ...

, abbreviated as State Transport * Sound Transit, Central Puget Sound Regional Transit Authority, Washington state, US *

Springfield Terminal Railway (Vermont) Pan Am Railways, Inc. (PAR) is a subsidiary of CSX Corporation that operates Class II regional railroads covering northern New England from Mattawamkeag, Maine, to Rotterdam Junction, New York. Pan Am Railways is primarily made up of former C ...

(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 contr ...

, 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 in Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN ...

, 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 publicat ...

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

Geography

* São Tomé and Príncipe (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 * St or St., abbreviation of

Strait A strait is an oceanic landform connecting two seas or two other large areas of water. The surface water generally flows at the same elevation on both sides and through the strait in either direction. Most commonly, it is a narrow ocean chann ...

Language and typography

Sesotho language Sotho () or Sesotho () or Southern Sotho is a Southern Bantu language of the Sotho–Tswana ("S.30") group, spoken primarily by the Basotho in Lesotho, where it is the national and official language; South Africa (particularly the Free St ...

(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

Science and technology

Computing

* ST connector, a type of optical fiber connector *

Atari ST The Atari ST is a line of personal computers from Atari Corporation and the successor to the Atari 8-bit family. The initial model, the Atari 520ST, had limited release in April–June 1985 and was widely available in July. It was the first pers ...

, 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) *

, 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) The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the inter ...

(St), a CGS unit of kinematic viscosity *

Stone (weight) The stone or stone weight (abbreviation: st.) is an English and imperial unit of mass equal to 14 pounds (6.35 kg). The stone continues in customary use in the United Kingdom for body weight. England and other Germanic-speaking co ...

(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 Sulfotransferases (SULTs) are transferase enzymes that catalyze the transfer of a sulfo group from a donor molecule to an acceptor alcohol or amine. The most common sulfo group donor is 3'-phosphoadenosine-5'-phosphosulfate (PAPS). In the case o ...

, enzymes that catalyze the transfer of a sulfo group *

Heat-stable enterotoxin Heat-stable enterotoxins (STs) are secretory peptides produced by some bacterial strains, such as enterotoxigenic ''Escherichia coli'' which are in general toxic to animals. These peptides keep their 3D structure and remain active at temperatu ...

, secretory peptides produced by some bacterial strains, such as enterotoxigenic ''Escherichia coli''

Other uses

* -st, a suffix for an

ordinal number In set theory, an ordinal number, or ordinal, is a generalization of ordinal numerals (first, second, th, etc.) aimed to extend enumeration to infinite sets. A finite set can be enumerated by successively labeling each element with the least ...

, such as 1 or 21 * Saint (St or St.), especially in Christianity *

Scheduled Tribes The Scheduled Castes (SCs) and Scheduled Tribes (STs) are officially designated groups of people and among the most disadvantaged socio-economic groups in India. The terms are recognized in the Constitution of India and the groups are design ...

, 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 Buses have been used as a mode of public transport in London since 1829, when George Shillibeer started operating a horse-drawn ''omnibus'' service from Paddington to the City of London. In the decades since their introduction, the red London ...