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 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)

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.

Other businesses and organizations

• Statstjänstemannaförbundet, or Swedish Union of Civil Servants, a trade union
• 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)
• 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

• st, the ISO 639-1 language code for the Sesotho language
• ſt, or st, a typographic ligature
• 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

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^st or 21^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

• STST (disambiguation)
• STFC (disambiguation) for uses of ST F.C.