MTT

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

Fiction

 * Multi-troop transport vehicle in Star Wars
 * Mettaton, a robot character from Undertale

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