| RNIB | Royal National Institute for the Blind |
|---|---|
| RNID | Royal National Institute for the Deaf |
| BNIST | National Bureau of Scientific Information [Fr. Bureau National d'Information Scientifique] |
| NAC | N-acetylcysteine; National Asthma Center; National Audiovisual Center; Noise Advisory Council |
| NAF | nafcillin; National Amputation Foundation; National Ataxia Foundation; net acid flux |