Organizations
- TG Sambo, a Korean computer manufacturer
- TG Xers, a team in the Korean Basketball League, now renamed Wonju Dongbu Promy
- The IATA airline code for Thai Airways International
- Theodore Goddard, the eponymous law firm established by John Theodore Goddard, solicitor to Wallis Simpson
- Toyota Group
- ThinkGeek, an internet retailer selling items of interest to self-described geeks
- Communist Party of China, a short for TuGong ("土共"), which is again short for Bandit Communist Party ("土匪共产党") or "yokel Communist Party" ("乡巴佬共产党")
- TransDigm Group, a manufacturer of aerospace components
- Triumph Group, an aftermarket repair company in Wayne, Pennsylvania, United States
- Torture Garden (fetish club), the fetish club organisers
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