ST

ST may refer to:

General

• Saint (St or St.), especially in Christianity
• Street (St or St.), a public thoroughfare
• Strait (St or St.), a body of water
• -st, a suffix for an ordinal number, such as 1^st or 21^st
• Septic tank, on real estate documents
• Spread Tow, a technology for spreading a tow to make ultra light fabric for the composites industry
• Steam tug, a ship class prefix
• Sine tempore (s.t.), indicates that an academic lecture will begin at the exact time; see Academic quarter (class timing)
• Common stock (US) or ordinary shares (British) (symbol St or StA) on the German Stock Exchange

Codes and identifiers

• .st, Internet country code top-level domain for São Tomé and Príncipe
• São Tomé and Príncipe, by ISO 3166-1 country code
• Sesotho language, by ISO 639-1 language code
• Germania (airline), by IATA airline designator
• Split, Croatia, by vehicle license plate code
• Springfield Terminal Railway (Vermont), by railroad reporting mark

Computing

• Number of sectors in cylinder-head-sector (CHS) hard disk drive access method
• ST connector, a type of optical fiber connector
• Atari ST, a personal computer
• Internet Stream Protocol, an experimental Internet protocol
• State Threads, a user-space threading C-library, especially for network-applications
• Structured text, a high-level programming language that syntactically resembles Pascal
• Sublime Text, a cross-platform text and source code editor
• STxxxxxx Seagate hard disk drive family

Language and typography

• ſt, or st, a typographic ligature
• Stet, a printer's proofing mark on manuscripts
• Standard Theory, in generative grammar

Mathematics, medicine and science

• "subject to" or "such that" (s.t.) to indicate constraints
• Speech therapy, a treatment in Speech-Language Pathology
• ST segment, the part of an electrocardiogram connecting the QRS complex and the T wave
• String theory, a branch of theoretical physics
• Stanton number, a term used in physics
• Strouhal number, a term used in fluid mechanics
• Standard part function, a term used in non-standard analysis
• Tropopause, the Stratosphere-Troposphere boundary in the atmosphere

Units of measurement

• Short ton, a unit of mass equal to 2000 lb, or one ton in the United States
• Stere, a unit of volume equivalent to one cubic meter, used to measure cordwood
• Stokes (unit) (St), a CGS unit of kinematic viscosity
• Stone (weight) (st.), a unit of mass used in the British Isles and other countries

Media, music, and entertainment

• Stanza (st.)
• School Tycoon, a video game
• Self-titled, a term used in the record industry for eponymous albums
• The Sims 3: Showtime, the sixth expansion pack for The Sims 3
• The Legend of Zelda: Spirit Tracks, a video game
• Storm Track, an early magazine about storm chasing
• Star Trek, a television and film franchise
• Suicidal Tendencies, an American heavy metal/hardcore punk band

Organizations

• Statstjänstemannaförbundet, or Swedish Union of Civil Servants, a trade union
• Secret Team, an alleged covert alliance between the CIA and American industry
• STMicroelectronics, a worldwide manufacturer of semiconductors
• SpeedTouch, a networking equipment company

Transport

• Maharashtra State Road Transport Corporation, abbreviated as State Transport
• Sound Transit, the popular name of Washington state's Central Puget Sound Regional Transit Authority
• Student Transportation, Inc., a school bus contractor
• Suffolk County Transit, or Suffolk Transit, the bus system serving Suffolk County, New York