| Abbreviation | Definition |
|---|---|
| NMP | nucleoside monophosphate |
| NN4B | NHS Numbers for Babies |
| NNT | new national target |
| NOF | National Obesity Forum |
| NOF | National Opportunities Fund |
| NOF | National Osteopathic Foundation |
| NOF | neurite outgrowth factor |
| NOID | Notification of Infectious Diseases |
| NOMIS | National Online Manpower Information Service |
| NOS | National Occupational Standards |
| NOS | nitric oxide synthase |
| NOS | no organisms seen |
| NOS | non-organ specific |
| NOS | not on staff |
| NOS | Not Otherwise Specified |
| NP | N protein |
| NP | nasal polyp |
| NP | national priorities |
| NP | National Program |
| NP | National Programme |