| Abbreviation | Definition |
|---|---|
| NFFI | National FFA Foundation, Inc. |
| NFFI | National Neurofibromatosis Foundation, Inc. |
| NFFR | National Foundation for Facial Reconstruction |
| NFI | New Frontiers International |
| NFI | Non Food Item |
| NFIE | NEA Foundation for the Improvement of Education |
| NFIPME | National Foundation for Integrated Pest Management Education |
| NFIW | National Federation of Indian Women |
| NFLB | No Feline Left Behind |
| NFLC | Northern Forest Lands Council |
| NFNF | Nurses for Newborns Foundation |
| NFO | National FFA Organization |
| NFP | not for profit |
| NFPF | National Film Preservation Foundation |
| NFPRHA | National Family Planning and Reproductive Health Association |
| NFS | National Federation of Settlements |
| NFSW | National Federation of Social Work |
| NFT | National Foundation for Transplants |
| NFT | Noorda Family Trust |
| NFTC | National Forensics Training Center |