TSS may refer to: Organizations Tanglin Secondary School, a government secondary school in Clementi, Singapore The Southport School, Anglican day and boarding school on Gold Coast, Queensland, Australia Tinana State School, a public primary school in Maryborough, Queensland, Australia Thornhill Secondary School, in Canada Tideway Scullers School, a rowing club in London, England Telangana Sports School, a sports school in Hyderabad, India Times Square Stores, a US retail department store chain Technical Services Staff, a component of the U.S. Central Intelligence Agency TV Shinhiroshima, a TV station in Japan Total System Services, Inc. (NYSE symbol) Ton Steine Scherben, a German rock band Science and technology Traffic Separation Scheme, a traffic-management route-system ruled by the International Maritime Organization TSS-1, Tethered Satellite System-1, a 1990s joint space experiment program between Italy and USA flying a space tether TSS-1R, reflight of the Tethered Satellite System mission Tromsø Satellite Station, a satellite earth station located in Tromsø, Norway Toxic shock syndrome, a potentially fatal illness caused by a bacterial toxin Transcription start site, the starting point of the process of creating a complementary RNA copy of a sequence of DNA TSS (operating system), an early time-sharing operating system on the IBM System/360 Model 67 and System/370 Task State Segment, a special structure on x86-based computers which holds information about a task Total sum of squares, a quantity that appears as part of a standard way of presenting results Total suspended solids, a water quality measurement TATSU Signing Server, an Apple server which controls whether iOS versions can be restored to TCG Software Stack, a software stack by TCG that allows interaction with a TPM Texas Supernova Search, a program to search for new supernovae and other astronomical transients Transport Tsing Shan Tsuen stop, Hong Kong (MTR station code TSS) Twin-screw steamer, a steam-powered vessel with two screw propellers Toyota Safety System