MTT can refer to: People Michael Tilson Thomas (nicknamed 'MTT'), American musician, conductor, pianist Technology and science Meaning–text theory, a theory in linguistics MTT assay using dimethyl thiazolyl diphenyl tetrazolium salt, a type of tetrazole Multi-transaction translator, a particular functional unit in USB hubs Business Marine Turbine Technologies Maritime Telephone and Telegraph Company, later known as MTT or MT&T Transport Metropolitan Transport Trust, transport authority in Western Australia from 1958 to 2003 Minatitlán/Coatzacoalcos National Airport, IATA code MTT Municipal Tramways Trust, former body in Adelaide, South Australia Other Maria Theresa thaler, former Austrian coin used in many areas Pashtun Tahafuz Movement (PTM), formerly known as the Mehsud Tahafuz Tehrik (MTT), a human rights movement in Pakistan for the Pashtun people Multi-table tournament, a type of poker tournament Modus tollens, a kind of rule of inference also known as modus tollendo tollens Fiction Multi-troop transport vehicle in Star Wars Mettaton, a robot character from Undertale