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TOS may refer to:
GeneralEdit
- Terms of service
- The original series of a particular media, in contrast to a spin-off
ChemistryEdit
- Tosyl, a chemical group
- Gy's sampling theory (abbreviation)
EntertainmentEdit
- Star Trek: The Original Series, a science fiction TV series originally known as Star Trek
- Tree of Savior, a multiplayer online role playing game published by IMC Games in 2016
- Town of Salem, a social deduction game published by BlankMediaGames in 2014
- Temple of Shadows, 2004 album by Angra
- T·O·S (Terminate on Sight), 2008 album by G-Unit
MedicineEdit
- Thoracic outlet syndrome, a medical condition
- Toxic oil syndrome, caused by consuming non-food grade oil
OrganizationsEdit
- The Oceanography Society
- Theosophical Order of Service, an international organization
- Temple of Set, an occult society
- Tennessee Ornithological Society
- Trucial Oman Scouts, UK force raised in Oman in 1951
- TV Oita, a Japanese TV station
Other usesEdit
- TOS-1, a Soviet thermobaric weapon
- Tam o' Shanter (cap)
- Atari TOS (The Operating System, also unofficially known as Tramiel Operating System), computer operating system
- TOS/360, Tape Operating System/360
- Tromsø Airport, Norway, IATA code
- Type of service, a field in the header of IPv4 packets
- Terminal Operating System, controlling cargo movement
- Testament of Solomon, a pseudepigraphical composite text ascribed to King Solomon
- Town of Salem, a game under the social deduction genre