Other
- General set theory, an axiomatic system
- General strain theory in sociology, which states that social structures within society may encourage citizens to commit crime
- General systems theory, formerly synonymous with cybernetics
- Glutathione S-transferase, a family of enzymes
- The Great Southern Trendkill, an album by Pantera
- Greenwich Sidereal Time, a variant of Greenwich Mean Time used in astronomy
- Ground start in telephony
- Grace Somatomorphic Technique, an exercise and movement routine.
- Gulf Standard Time
- Grand Slam Tennis, a video game
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