| Abbreviation | Definition |
|---|---|
| NELF | New England Legal Foundation |
| NELFT | North East London NHS Foundation Trust |
| NFAA | National Foundation for Advancement in the Arts |
| NFAF | Noyes Fine Arts Foundation |
| NFAM | National Foundation of Alternative Medicine |
| NFAP | National Foundation For American Policy National |
| NFAW | National Foundation of Australian Women |
| NFCA | National Foundation for Celiac Awareness |
| NFCC | National Foundation for Credit Counseling |
| NFCM | New Foundations for Classical Mechanics |
| NFCR | National Foundation for Cancer Research |
| NFD | National Foundation for the Deaf |
| NFDM | National Foundation for Debt Management |
| NFE | National Foundation for the Elderly |
| NFER | National Foundation for Educational Research |
| NFF | National Foliage Foundation |
| NFF | National Football Foundation |
| NFF | Noreen Fraser Foundation |
| NFF | Nuclear Friends Foundation |
| NFFF | National Fallen Firefighter Foundation |