| Abbreviation | Definition |
|---|---|
| NCI | Neutral Cycle Indicator |
| NCMEC | North Central Missouri Electric Cooperative |
| NCMP | Non-Causal Minimal Power |
| NCMS | National Center for Manufacturing and Science |
| NCMT | Network Configuration Management Tool |
| NCS | Network Communication Standard |
| NCT | Nano-Carbon Technology |
| ND | Native Defect |
| ND | Neutral Density filter |
| ND | No Discrimination |
| ND | No Dolby |
| ND:YLF | Neodymium: Yttrium Lithium Fluoride (laser) |
| NDCR | Non-linear Distributively Coupled Resonator |
| NDE | Non-Destructive Evaluation |
| NDF | Next Double Filament |
| NDFS | Non-Dedicated File Server |
| NDIR | Non-Dispersive Infrared Spectroscopy |
| NDL | Nano Device Laboratory |
| NDSF | Non-Dispersion Shifted Fiber |
| NDSI | Non-Direct Surface Installation |