TS

• Air Transat (IATA code TS), a Canadian airline
• Tenaris (NYSE symbol), a global manufacturer of steel pipe products
• Theosophical Society, religious philosophy
• Tidewater Southern Railway (reporting mark TS), a former US railroad
• Trabzonspor, a Turkish Football Club
• Transcendental Students, a former radical student group at NYU
• TS Ferries, an Estonian ferry line

• Ts (digraph), a digraph in the Latin alphabet
• Voiceless alveolar sibilant affricate (⟨⟩, ⟨⟩, or ⟨⟩), a type of consonantal sound
  • Tse (Cyrillic) (Ц ц), the Cyrillic letter representing the voiceless alveolar affricate
• Tsonga language (ISO 639 code: ts), of southern Africa

• Tensile strength, in materials science
• Terasecond, symbol Ts, =10¹² seconds

Biology and medicine

• Transverse section, a term used in microscopy when prepared slide has a sample transversely dissected.
• Thymidylate synthase, the enzyme used to generate thymidine monophosphate
• Tourette syndrome, a neurological condition involving involuntary tics
• Turner syndrome, a condition in which a female is partly or completely missing an X chromosome

Chemistry

• Tennessine, symbol Ts, a chemical element
• Tosyl, a group in organic chemistry
• Transition state, of a chemical reaction

Electronics and computing

• Adobe Technical Communication Suite, an Adobe software family
• MPEG transport stream (file extension.ts), a digital media container format
• Telesync, a bootleg recording of a film recorded in a movie theater
• Terminal Services, a component of Microsoft Windows operating systems
• Tip-Sleeve, a standard monaural phone connector
• TypeScript (file extension.ts), a Microsoft programming language

Mathematics

• Tabu search, a search method
• Tate–Shafarevich group, in arithmetic geometry
• Transition system, a directed graph model

• Twin Spark, an Alfa Romeo car engine technology
• Turbine Steamship (ship prefix)
• Turn and slip indicator, an avionics instrument
• Training Ship (ship prefix)
• Telangana State (vehicle registration code TS), India
• Tunisia (aircraft registration prefix TS)
• Tobu Skytree Line, Kameido Line, and Daishi Line (railway line prefix TS)

• Teaspoon (ts.), a measure in cooking
• ISO Technical Specification, e.g. ISO/TS 16949:2009
• Top Secret, a security classification
• TeamSpeak, a proprietary voice-over-Internet Protocol application for audio communication
• TS postcode area, UK
• Transition School, a one-year program at the University of Washington; see Transition School and Early Entrance Program