| Abbreviation | Definition |
|---|---|
| NPV | Negative Predictive Value |
| NPV | negative predictive value(s) |
| NPVI | Normalized Pairwise Variability Index |
| NR | Narrow Range |
| NR | Newton Raphson |
| NR | Non-Random |
| NR | Number of Restrictions |
| NR | Numerical Recipes, the Art of Scientific Computing |
| NRA | Nested Relational Algebra |
| NRC | Normal Rational Curve |
| NRFT | Non- Real Fourier Transform |
| NRS | Numeric Rating Scale |
| NRUM | Nested Random Utility Model |
| NS | Navier-Stokes equations |
| NS | Not Significantly |
| NSA | Number of Signal Averages |
| NSD | Number of Standard Deviations |
| NSE | Nissan Stanza Enthusiast |
| NSFD | Non-Standard Finite Difference |
| NSG | No Sphere Grid |