STG
- European University Institute
- Glasgow Haskell Compiler
- Organization of the Luftwaffe (1933–45)
- Petri net
- Pound sterling
- Scandinavian Tobacco Group
- Security Threat Group
- Shoot 'em up
- Slaves to Gravity
- Somali Telecom Group
- Sonar Technician
- Special Tactics Group
- St. George Airport (Alaska)
- Star Trek Generations
- Stirling railway station, Scotland
- Stomatogastric ganglion
- Strike Gunner S.T.G
- Sturmgewehr
- Superior temporal gyrus
- Symphony Technology Group
- Syrian transitional government
- University of Toronto St. George