TST may stand for:

Science and technology

  • Ternary search tree, in computer science
  • Transition state theory, of chemical reaction rates
  • TST (gene)
  • Tuberculin skin test
  • Tectonic strain theory, in geology
  • Total sleep time
  • Total station theodolite, instrument used for surveying and building construction
  • Typed set theory, in mathematical logic
  • Transgressive systems tract, in sequence stratigraphy (geology)
  • Tail suspension test, stress test for rats
  • Team selection test
  • TEST (x86 instruction), short form for the TEST assembly instruction

Places

  • Tsim Sha Tsui, an urbanized area in Hong Kong
  • Tsim Sha Tsui station, a railway station there
  • Trang Airport in Thailand (IATA airport code)

Organisations and groups

  • Telesta Therapeutics, Toronto Stock Exchange symbol
  • TheStreet.com, NASDAQ trading symbol
  • Toronto School of Theology, Canada
  • TST-CF Express, Canadian LTL freight carrier formerly known as TST Overland Express
  • Tribunal Superior do Trabalho, (Superior Labor Court), Brazil federal courts
  • The Satanic Temple, nontheistic religious and human rights organization

Other

  • .TST, ExamView file extension
  • Tolley, Scott & Tolley, Australian winemakers
  • Top Secret (TST), a South Korean band
  • The Soccer Tournament, a sports tournament
  • Taiwan Standard Time, the standard time zone used in Taiwan (UTC+8).