TMT

• Tandem mass tag, a chemical label
• Temporal motivation theory, in psychology
• Terror management theory, in psychology
• Thermo-mechanical treatment, a metallurgical process
• Thirty Meter Telescope, astronomical telescope
• Trimethylthiazoline, a component of fox urine
• Trimethyltrienolone, an antiandrogen
• Trimethyltryptamine, synthetic and fungal biosynthetic indole molecules

• Texas Multicore Technologies, licensee of SequenceL programming language

• Today Makes Tomorrow, a Taiwanese shipping company
• Thane Municipal Transport, a bus operator in India
• Toyota Motor Thailand
• Tubular Modular Track for railways
• Porto Trombetas Airport, Pará, Brazil, IATA code

• The Manila Times, a newspaper in the Philippines
• The Moscow Times, an Amsterdam-based newspaper
• Tiny Mix Tapes, a music web site
• {{ill|TMT (TV channel)|pl|3=TMT}}, a defunct Polish cable channel (1998-2008)

• TMT FC, a Gambian football club
• The Money Team, a brand of American boxer Floyd Mayweather Jr.

• Türk Mukavemet Teşkilatı ("Turkish Resistance Organisation"), Cyprus, 1958-1974
• Turkmenistani manat, ISO 4217 currency code
• Top Management Team, senior management in a business
• Technology, Media and Telecommunications, industry sector for investment banking

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