OTS

• Orchestra at Temple Square, an LDS orchestra located in Salt Lake City, US
• Over-the-shoulder shot, a film technique

• Ocean Therapy Solutions, U.S. company making centrifuge pumps for oceanic oil spill cleanup

• Office of Tax Simplification, a United Kingdom Treasury tax office
• Office of Technical Service, a division of the Central Intelligence Agency
• Office of Thrift Supervision, a U.S. Treasury Department agency
• Office of Transport Security, Australia
• Organization of Turkic States, international organization comprising prominent independent Turkic countries

• Air Force Officer Training School, a U.S. Air Force training center
• Officers' Training School RAAF, a Royal Australian Air Force training center
• Officers Training School, Bahtoo, a Myanmar army training centre

• Ohr Torah Stone, an international Modern Orthodox organization
• Orthodox Theological Seminary, Kottayam, a seminary under the Indian Orthodox Church
• Order of the Solar Temple (French: Ordre du Temple solaire, OTS), French esoteric cult

• Octadecyltrichlorosilane, a chemical forming self-assembled monolayers
• OpenTimestamps, a cryptographic timestamping standard
• Operator Training Simulator, a simulation platform for industrial operator training
• Orbital Test Satellite, a European Space Agency program
• Organization for Tropical Studies, a U.S.-based group of biological research stations in Costa Rica
• TsO (tosylate), the anion of p-toluenesulfonic acid, a tosyl compound

• MS Georg Ots, a ferry named for Georg Ots
• Anacortes Airport (IATA code: OTS), in Anacortes, Washington, US

• Georg Ots (1920–1975), Estonian musician
• Izh (river) (Tatar: Otš), in Tatarstan, Russia
• Opportunity to see, a measure of the penetration of advertising

• Off-the-shelf (disambiguation)

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