Tactical Standing Operation Procedure The Sound of Philadelphia (classic 1970s R&B instrumental) TSR – many, including terminate-and-stay-resident (program) TSSIA – (i) the subject says it all TT tt – (s) Tatar language (ISO 639-1 code) TT (s) Teratesla (i) Terrestrial Time Tourist Trophy (Motorcycle sport) (s) Trinidad and Tobago (ISO 3166 digram) TTBAO - Things To Be Aware Of TTCT – Torrance Tests of Creative Thinking TTD – (s) Trinidad and Tobago dollar (ISO 4217 currency code) TTO – (s) Trinidad and Tobago (ISO 3166 trigram) TTFN – (i) Ta Ta For Now TTL (i) Tax, Title, License (i) Through-the-lens (photography) Time 'till live Time to live Transistor–transistor logic TTP (i) Tactics, Techniques, and Procedures Thrombotic thrombocytopenic purpura Trailer Transfer Point TTTEAF – Thomas the Tank Engine and Friends TTY – (i) TeleTYpewriter (Printer) TTYL – (i) Talk To You Later (Internet slang) TTZ – (p) Tetrazolium TU TU – (i) Technische Universität'' (German for "Technical University") – Thammasat University (Thailand) – (s) Turkey (FIPS 10-4 country code) TUC – (i) Trades Union Congress TUG – (a) TeX Users Group TUI – (a/i) Text-based user interface (cf. CLI), among other uses tuk – (s) Turkmen language (ISO 639-2 code) TUN – (s) Tunisia (ISO 3166 trigram) TUNS – (i) Technical University of Nova Scotia Tur – (s) Turkish language (ISO 639-2 code) TUR – (s) Turkey (ISO 3166 trigram) TUSK – (a) Tank Urban Survival Kit TUV – (s) Tuvalu (ISO 3166 trigram) TV – (i) Time value, a designation seen on some camera dials for shutter priority mode TV (i) Television (s) Teravolt (i) Transvestite (s) Tuvalu (ISO 3166 and FIPS 10-4 country code digram) TVA – (i) Tennessee Valley Authority TVG (p/i) Television Games (Network) (i) Tick, Very Good, Often used by School Teachers when marking homework etc. (Tick VG) TVR – (i) TreVor (Wilkinson) Racing TVS – (i) Tornado vortex signature TW TWA - Trans World Airlines tw – (s) Twi language (ISO 639-1 code) TW – (s) Republic of China (Taiwan) (ISO 3166 and FIPS 10-4 country code digram) – TW terawatt TWAIN – (a) Technology Without An Interesting Name TWD – (s) Taiwan dollar (ISO 4217 currency code) TWE – (a) Trans World Entertainment twi – (s) Twi language (ISO 639-2 code) TWI – (i) The Welding Institute TWN – (s) Republic of China (Taiwan) (ISO 3166 trigram) TWP – (i) Technical Working Paper Twp