| Abbreviation | Definition |
|---|---|
| SVN | South VietNam |
| SW | Specific Weight |
| SWE | Sweden (Svenska) |
| SY | Syria |
| SZ | Swaziland |
| TAN | Tanzania |
| TC | Turks and Caicos Islands |
| TCI | Turks and Caicos Islands |
| TD | Chad |
| TF | French Southern Territories |
| TG | Togo |
| TH | Thailand |
| THA | Thailand |
| THAI | Thailand |
| TJ | Tadjikistan |
| TJK | Tajikistan |
| TK | Tokelau |
| TKM | Turkmenistan |
| TM | Turkmenistan |
| TN | Thai Nation |