| Abbreviation | Definition |
|---|---|
| NTF | Nigeria Trust Fund |
| NTFG | Nonprofit Tech For Good |
| NTHP | National Trust for Historic Preservation |
| NTI | Nunavut Tunngavik Inc. |
| NTL | National Trust Library |
| NTQ | National Trust of Queensland |
| NTSAD | National Tay-Sachs & Allied Diseases Association |
| NTTF | Nettur Technical Training Foundation |
| NTU | National Taxpayers Union |
| NTUF | National Taxpayer Union Foundation |
| NTUF | National Taxpayers Union Foundation |
| NTUO | National Taxpayers Union of Ohio |
| NTW | Nourish The World |
| NTWC | National Trails and Waters Coalition |
| NUA | National Unaffiliated Application |
| NUAF | National Union of American Families |
| NUF | National Urban Fellows |
| NUFI | National Urban Fellows, Inc. |
| NULA | National Urban League Affiliate |
| NULI | National Urban League, Inc. |