TSO may refer to:

Science and technology

  • Transmission system operator, an entity involved in transmission of electric power or natural gas
  • Technical Standard Order, a minimum performance standard issued by the FAA for certain items used on civil aircraft
  • Trichuris suis, a species of whipworm, a parasite of pigs

Computing

  • Total store order, in memory ordering
  • Time Sharing Option, an interactive command line interpreter for IBM mainframe operating systems OS/360, SVS, MVS, OS/390 and z/OS
  • TCP segmentation offloading, a technique for increasing outbound throughput of high-bandwidth network connections

Music

  • Taipei Symphony Orchestra
  • Tasmanian Symphony Orchestra
  • Tehran Symphony Orchestra
  • The Summer Obsession
  • Tokyo Symphony Orchestra
  • Toledo Symphony Orchestra
  • Toronto Symphony Orchestra
  • Trans-Siberian Orchestra
  • Tucson Symphony Orchestra

Transportation

  • Tourist Standard Open, a type of British Railways loco-hauled coach
  • Trailer Standard Open, a type of British Railways coach
  • Marcos TSO, a sports car manufactured by Marcos Engineering Ltd
  • Transportation security officer, a federal employee of the Transportation Security Administration, a division of the U.S. Department of Homeland Security
  • Transaero Airlines, a former Russian airline (ICAO code: TSO)
  • Tresco Heliport, a former heliport in the Scilly islands (IATA code: TSO)

Other uses

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  • Threefold social order, a sociological theory involving the relationship of economy, polity and culture
  • The Sims Online, a massively multiplayer game
  • The Stationery Office, a British publisher
  • Total shares outstanding, the stock held by investors, including restricted shares, as well as those held by the public; see Shares outstanding

See also

  • Tso (disambiguation)