| Acronym | Definition |
|---|
| NIAF➣National Italian American Foundation |
| NIAF➣Netherlands Institute for Animation Film (Tilburg, Netherlands) |
| NIAF➣Northern Ireland Athletics Federation (UK) |
| NIAF➣National Illness Assistance Fund (India) |
| NIAF➣Neo-Indie Arts Festival (now Greater Washington Indie Arts Festival; Washington, DC) |
| NIAF➣Newcastle Independence Assessment Form (neurology; University of Newcastle; UK) |