| NIFTI | National Incubator Farm Training Initiative 
| Others |
| NIFTI | Nature Inspired Flight Technologies and Ideas
| Others |
| NIFTI | Network Interface to File Transfer in the Internet
| Others |
| NIFTI | Neuroimaging Informatics Technology Initiative
| Others |
| NIFTI | New Investigator Fellowship Training Initiative
| Others |
| NIFTI | Non Intrusive Flight Test Instrumentation
| Others |