| Abbreviation | Definition |
|---|---|
| NPA | Number of Projected Attributes |
| NPCD | National Patient Care Database |
| NPD | Nuclear Protein Database |
| NPE | Null Pointer Exception |
| NR | Number of Records |
| NR | Number of Rows |
| NRD | Nationwide Readmissions Database |
| NRDB | National Road DataBase |
| NRDB | Natural Resources DataBase |
| NRDB | Non-Redundant DataBases |
| NRDS | National REALTOR® Database System |
| NRRD | Nearly Raw Raster Data |
| NRRO | Not Really Raster Object |
| NSBD | Neurocognitive Suicidal Behaviours Database |
| NSD | National Security Database |
| NSDB | National Soil Database Abbreviation |
| NSDB | Navy Shock Data Base |
| NSDB | Network and Services Data Base |
| NSDD | Nato Standardization Document Database |
| NSDD | Natural State Digital Database |