ST, St, or St. may refer to:

Arts and entertainment

* Stanza, in poetry *

Suicidal Tendencies Suicidal Tendencies is an American crossover thrash band formed in 1980 in Venice in Los Angeles, California by vocalist Mike Muir. Muir is the only remaining original member of the band. Along with D.R.I., Corrosion of Conformity, and Stor ...

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

Other businesses and organizations

* Statstjänstemannaförbundet, or Swedish Union of Civil Servants, a trade union * The Secret Team#Secret Team, The Secret Team, 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, Internet country code top-level domain for São Tomé and Príncipe * Saxony-Anhalt, a state of Germany * Split, Croatia (vehicle plate code ST) * ST postcode area, 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

* Sesotho language (ISO 639-1 language code "st") * ﬅ, or st, a typographic ligature * Standard Theory in Generative grammar#Frameworks, 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 *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 (linguistics), ordinal number, such as 1 or 21 * Saint (St or St.), especially in Christianity * Scheduled Tribes, in India * Ship prefix#Generic (merchant navy) prefixes, 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) * Striker (association football), a position in association football * ST, a type of Buses in London, London bus