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 Television Shin-Hiroshima, a TV station in Japan Total System Services, Inc. (NYSE symbol) Ton Steine Scherben, a German rock band
Retail
Times Square Stores, a defunct American department store also branded as "TSS"
Science and technology
Tiangong Space Station, a permanently crewed space station constructed by China. 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 Time Sharing 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 or updated on a device Trusted Platform Module (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 Toyota Safety Sense, a collision avoidance system by Toyota Thyristor Surge Suppressor, another name for a Thyristor Surge Protection Device (TSPD)
Transport
Tsing Shan Tsuen stop, Hong Kong (MTR station code TSS) Trans Semanggi Suroboyo in Surabaya, Indonesia Twin-screw steamer, a steam-powered vessel with two screw propellers