| Abbreviation | Definition |
|---|---|
| SWT | St. Helena Bay Water Quality Trust |
| SWU | Stand With Us |
| SWY | Ship for World Youth Program |
| SYF | Simon Youth Foundation |
| SYM | Stubbers Young Mariners Sailing club |
| SZK | Sveriges Zoologiska Konservatorer |
| TA | Trailplace Advocacy |
| TAA | Taiwanese American Association |
| TAA | Turkish American Association |
| TAAC | The Association of American Cultures |
| TAAC | Turkish American Association of California |
| TAACERC | Turkish American Association of California Earthquake Relief Center |
| TAADAC | Tennessee Association of Alcohol and Drug Abuse Counselors |
| TAADAC | Texas Association of Alcohol and Drug Abuse Counselors |
| TAAE | Texas Association for Alternative Education |
| TAAF | The Aneurysm and AVM Foundation |
| TAAF | Turkish American Alliance for Fairness |
| TAAG | Transylvania Animal Alliance Group |
| TAAG | Tsinghua Alumni Association of Georgia |
| TAAM | Turkish American Association of Minnesota |