TM
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 (Tm) 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 Tm), 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 1012 metres TM (triode) (from French Telegraphie Militaire), 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.