Business

• Trademark (™)
• LAM Mozambique Airlines (the national airline for Mozambique), "TM" is its IATA airline designator
• Telekom Malaysia (the largest telecommunication company in Malaysia)
• Texas Mexican Railway
• TM Supermarket, a supermarket chain in Zimbabwe
• TM Television, a television channel in Mongolia
• T-money, Korea's first smart card. (Tm)
• TransMilenio, a Colombian bus rapid transit system.
• Tokyo Marui, a Japanese Airsoft gun manufacturer
• Touch Mobile, Philippines
• Toyota Motor Corporation, which trades on the New York Stock Exchange with symbol "TM".

Electronics and movies

• .tm, the Internet domain code for Turkmenistan.
• struct tm, an aggregate datatype in C and C++ for representing calendar dates
• Text mining
• Turing Machine
• TextMate, a text editor
• TrackMania, a PC Racing Game
• Transactional memory
• Translation memory
• Tow Mater, character in Cars and Cars 2, often shortened to Mater

People

• Tim Meadows, actor
• Tony MacAlpine, an American virtuoso guitarist and keyboard player
• Tony Montana, Coke dealer

Places

• Timiş county (Romania) indicative (TM)

Pop Culture

• Thrash metal
• Transcendental Meditation

Science

• melting temperature in shorthand
• Temporomandibular joint or TMJ
• Terametre (Tm)
• Thematic Mapper, Earth observing sensor aboard Landsat 5 in the Landsat program.
• Transcendental Meditation
• Transverse Magnetic modes, in optics and wave theory
• Tympanic membrane
• Transmembrane protein
• Transition metal
• Thulium, a lanthanide element with 69 protons in its nucleus
• Transverse myelitis - a neurological disorder
• Transverse Mercator, a type of map projection