| Abbreviation | Definition |
|---|---|
| TEF | Telemark Educational Foundation |
| TEFAP | The Emergency Food Assistance Program |
| TEFI | Tailhook Educational Foundation, Inc. |
| TEFI | Telemark Educational Foundation, Inc. |
| TEI | Tax Executives Institute |
| TEI | Tax Executives Institute, Inc. |
| TEI | The Entrepreneurship Institute |
| TEI | The European Institute |
| TEKF | The Ethan King Foundation |
| TELLFA | Turkey - Estonia - Latvia - Lithuania Friendship Association |
| TEMA | Tubular Exchanger Manufacturers Association |
| TENP | The Environmental Network for Pembrokeshire |
| TERA | Toronto Electric Riders' Association |
| TERA | Toxicology Excellence for Risk Assessment |
| TERC | Travel Europe Resource Center |
| TERE | Teachers Enterprise in Religious Education |
| TERI | Tata Energy Research Institute |
| TF | Tibet Fund |
| TF | Treehouse Foundation |
| TFA | Teach For America |