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TM or Tm and variants may refer to:

• Trademark, often indicated with the symbol ™
  • Trademark symbol

Businesses and organizations

• TM Forum, telecommunications and entertainment industry association
• TM Supermarket, a chain of supermarkets in Zimbabwe
• LAM Mozambique Airlines (IATA airline designator TM)
• Telekom Malaysia, telecommunications company
• Texas Mexican Railway (reporting mark TM)
• TM (cellular service), a telecommunications brand in the Philippines
• Toastmasters International, an international public speaking organization
• Toyota Motor Corporation (NYSE symbol TM)
• Tokyo Metro, one of the major subway systems of Tokyo

Science and technology

Biology and medicine

• Melting temperature (T_m) in nucleic acid thermodynamics, at which half of DNA strands are in the ssDNA state
• Transport maximum, where concentration increase does not speed membrane traversal
• Transverse myelitis, a neurological condition in which the spinal cord is inflamed
• Translational medicine

Computing

• .tm, the Internet domain code for Turkmenistan
• Struct tm, calendar time type in the C and C++ programming languages
• Traceability matrix, in software development
• Translation memory
• Turing machine, a hypothetical universal computing machine

Physics and chemistry

• Tm ligands, a tridentate ligand used in coordination chemistry
• Melting point (abbreviated T_m), in physics and materials science
• Thulium, symbol Tm, a chemical element
• Transition metal
• Transverse Magnetic modes, in optics and wave theory

Weapons

• TM 65 mine, a Finnish anti-tank mine
• TM series of Soviet and Russian anti-tank mines
  • TM-41 mine, a Soviet World War II mine
  • TM-46 mine, a Soviet post-war mine
  • TM-57 mine, a Soviet Cold War mine
  • TM-62 series of mines, a series of Soviet Cold War blast mines
  • TM-83 mine, a 1990s Russian mine
  • TM-89 mine, a 1990s Russian mine

Other uses in science and technology

• Thematic Mapper, an Earth-observing sensor on a Landsat satellite
• Terametre (Tm), equal to 10 metres
• TM (triode) (from French Telegraphie Militaire), standard small-signal vacuum tube of the Allies of World War I

People

• Theresa May is sometimes referred to as TM

Other uses

• Taskmaster (TV series), a British TV comedy show adapted in several other countries.
• Thames Measurement, a shipping tonnage measure
• Their Majesties, for multiple monarchs each styled "His/Her Majesty"
• Torpedoman's mate, a former rank of the U.S. Navy
• Transcendental Meditation, a specific form of mantra meditation
• Trans-Manhattan Expressway, a highway in New York City
• Turkmenistan (ISO country code TM)
• TrackMania, a Nadeo game
• TM (album), an album by Brockhampton

• Disambiguation pages