Tensiomyography, a novel method for skeletal muscles' contractile parameters detection
Trimethylglycine, a chemical compound studied in biochemistry
Trimethylgallium, a chemical compound used in semiconductor fabrication
Touring Motor Glider, a term used in aviation
Thermal Micrometeoroid Garment, the outer layer of a space suit
Thermomechanical generator, a Stirling engine invented by Cooke-Yarborough
Threat Management Gateway, a software-based firewall solution, the member of Microsoft's Forefront product family, the successor of the internet Security and Acceleration Server
TMG (programming language), an early compiler definition language, and the name of the utility which parsed it
1,1,3,3-Tetramethylguanidine, a chemical compound
In music:
KTMG, a commercial radio station in Prescott, Arizona, United States
WTMG, a commercial radio station in Williston, Florida, United States
Ted Mulry Gang, an Australian rock group
The Militia Group, a record label
The Mountain Goats, a folk rock band
Tak Matsumoto Group, a Japanese supergroup
In computing:
Microsoft Forefront Threat Management Gateway, a firewall and security software
The Master Genealogist, a genealogy software
In other media:
The Manipal Group
Trader Media Group, a publishing company based in the United Kingdom
Telegraaf Media Groep, a Dutch media and publishing company
The McLaughlin Group, a weekly public affairs show created by John McLaughlin
Terror of Mechagodzilla, a 1975 Science Fiction film directed by Ishiro Honda
Other uses:
TMG, Tunney Media Group, the fictional company that owns NBS on Studio 60 on the Sunset Strip
Tokyo Metropolitan Government, the city government of Tokyo
TMG, the NYSE symbol for oil pipeline and terminal company TransMontaigne
Tunisia Monitoring Group, a coalition of 16 free expression organisations
Toyota Motorsport GmbH, a company based in Cologne, Germany
The Muñoz Group, a leading research group working in the areas of Protein Folding in Madrid,Spain