TOS

• Terms of service
• The original series of a particular media, in contrast to a spin-off

• Tosyl, a chemical group
• Gy's sampling theory (abbreviation)

• Star Trek: The Original Series, a name retroactively applied to the 1960s science fiction TV series originally known as Star Trek
• Temple of Shadows, 2004 album by Angra
• T·O·S (Terminate on Sight), 2008 album by G-Unit
• Town of Salem, a social deduction game published by BlankMediaGames in 2014
• Tree of Savior, a multiplayer online role playing game published by IMC Games in 2016

• Thoracic outlet syndrome, a medical condition
• Toxic oil syndrome, caused by consuming non-food grade oil

• 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

• 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

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• ToS2 (disambiguation)
• Toos (disambiguation)
• Toss (disambiguation)
• TOC (disambiguation)

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