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 (NYSE symbol TM)
  • Tokyo Metro, one of the major subway systems of Tokyo

Science and technology

Biology and medicine

  • Melting temperature (T<sub>m</sub>) 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
  • TM domain, a membrane-spanning protein domain

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<sub>m</sub>), in physics and materials science
  • Thulium, symbol Tm, a chemical element
  • Transition metal
  • Transverse magnetic modes, in optics and wave theory

Other uses in science and technology

  • Thematic Mapper, an Earth-observing sensor on a Landsat satellite
  • Terametre (Tm), equal to 10<sup>12</sup> metres
  • TM (triode) (from French ), standard small-signal vacuum tube of the Allies of World War I

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