| Acronym | Meaning |
| RNS | Reactive Nitrogen Species |
| GWSS | Groundwater Supply Survey |
| DIN | Direct Injection Nebulizer |
| RSAC | Remote Sensing Applications Center (US Forest Service) |
| KHP | Potassium Hydrogen Phthalate |
| BSRS | Backward Stimulated Raman Spectrometry |
| SHRIMP | Sensitive High Mass Resolution Ion Microprobe |
| ORM | Other Regulated Material (DOT) |
| PDP | Plasma Display Panel |
| NWS | National Weather Service |