MT, Mt, mT, mt, or Mt. may refer to:

• MT Framework, a proprietary game engine
• Empty, meaning "out of ammunition", in slang
• Main Tank, the person who soaks up all the damage in an MMORPG; see Tank (gaming)
• Moon Tycoon, a simulation computer game
• Monopoly Tycoon, a video game
• Muscle Tracer, an enemy in the Armored Core video game series
• Mythic's Team, a team made by @-MythicYT- on YouTube.

• M. T. Vasudevan Nair, a Malayalam writer
• Meridian Tonight, a British regional news programme
• Motor Trend, an automotive magazine
• The Moscow Times
• The Musical Times, a classical music journal
• Tramways & Urban Transit formerly Modern Tramway, a British magazine

• Marianas Trench (band), a Canadian pop rock band
• Master tone, a form of musical ringtone
• Modern Talking, a band
• The Musical Times, a classical music journal

• Magical Trevor, a cartoon by Jonti Picking
• Megatokyo, a webcomic
• MT (Infinity Train), a fictional character in the television series Infinity Train
• Megatron (Transformers), a fictional robot/character in the Transformers franchise
• Musical theatre

• MT-Propeller, a German aircraft propeller manufacturer
• Mauritius Telecom, a telecommunications and Internet service provider
• Media Temple, a website hosting company
• Mississauga Transit, a public transit operator in Mississauga, Ontario
• Monotype Corporation, a font company
• Movable Type, a weblog publishing system
• Thomas Cook Airlines (IATA airline designator code MT)

• Motor transport
• Military time

• Mt or Mt., an abbreviation for the word mount, meaning mountain
• Malta (ISO 3166-1 alpha-2 code MT), a nation of Mediterranean islands
  • .mt, the top-level Internet domain for Malta
  • Maltese language (ISO 639 alpha-2 language code mt)
• Martin, Slovakia (vehicle plate code MT)
• Matera, Italy (vehicle plate code MT)
• Mato Grosso (ISO 3166-2:BR subdivision code MT), a state in Brazil
• Montana (postal code MT), US
• Mountain Time Zone, a time zone in North America

• Gospel of Matthew, a part of the New Testament
• Masoretic Text, the Hebrew text of the Jewish Bible (Tanakh)

• Medial temporal, part of the temporal lobe of the brain
• Metallothionein, a protein
• Methyltransferase, a type of enzyme
• Microtubule, a component of the cytoskeleton
• Middle temporal area, a region of the visual cortex (also called V5) where the motion of objects is analyzed
• Mitochondrion, an organelle found in most eukaryotic cells

• Magnetization transfer, a process contributing to image contrast in Magnetic resonance imaging
• Massage therapy, adding directed pressure to the body
• Massage therapist, the title of someone who performs massage therapy
• Music therapy, the clinical use of music to improve health and quality of life
• Medical technologist, a healthcare professional who performs diagnostic tests
• Medical transcriptionist, an allied-health professional who transcribes dictated medical reports
• Motivational therapy, a treatment for substance abuse
• Methyltestosterone

• .mt, the top-level Internet domain for Malta
• MT Framework, a proprietary game engine
• Machine translation, a subfield of computational linguistics
• Magnetic tape data storage, a digital recording method using magnetic tape
• Megatransfer, in computing, equal to one million transfer operations per second
• Mersenne twister, a pseudorandom number generator algorithm
• Mistype, a declaration of a mistake or typo when typing in a live-text platform such as instant messenger
• Mobile-terminated, a call, text message or data received on a mobile telephone
• Mobile Terminal, part of a Mobile Station in the GSM system architecture
• Multithreading (computer architecture), in computer hardware
• Multithreading (software), in computer software
• Multi-topology routing (also abbreviated MTR), an extension to the OSPF internet routing protocol (RFC 4915)

• Modus tollens, a concept in logic

• Honda MT, a motorcycle
• Yamaha MT series, a family of motorcycles
• Hyundai Mega Truck, a medium-duty truck
• Manual transmission, a part of a car
• MT or Marquitrans, a Spanish microcar

• Megatesla (MT), the SI unit of magnetic flux density
• Megaton (Mt), a TNT equivalent unit of explosive power
• Megatonne (Mt), a unit of mass equal to one billion kilograms (10⁹ kg)
• Megatransfer, in computing, equal to one million transfer operations per second
• Metric ton (t), equal to one thousand kilograms
• Millitesla (mT), the SI unit of magnetic flux density

• Machine taper, a system for securing accessories to a machine tool (or Morse taper, one particular type of machine taper)
• Magnetotellurics, a method of imaging underground structures
• Materials Today, a scientific journal
• Maxim–Tokarev, a Russian light machine gun
• Meitnerium, symbol Mt, a chemical element

• MT (footballer) (born 2001), Matheus Nunes Fagundes de Araújo, Brazilian footballer
• Maltese language (ISO 639 alpha-2 language code "mt")
• Management team
• Master of Arts in Teaching, a graduate degree in teaching; some schools use MT (Master of Teaching) rather than MAT
• Membership Training, trips taken by South Korean university students for the purpose of team building
• Motor Tanker or Motor Transport, in the name of a ship
  • Name prefix for Merchant vessels Motor Tanker or Motor Tug Boat
• Muay Thai, a Thai martial art

• The Maria Theresa thaler, generally abbreviated MTT but sometimes also seen as MT
• Mountain
• TM (disambiguation)