| Acronym | Meaning |
| FCS | Fluorescence Correlation Spectroscopy |
| IRIS | Imaging Of Radicals Interacting With Surfaces |
| GCP | Good Clinical Practice |
| RFC | Inhalation Reference Concentration |
| MLS | Microwave Limb Sounder |
| USACE | US Army Corp Of Engineers |
| FOEA | First-order Error Analysis |
| NIRE | National Institute For Resources And Environment |
| RUDAD | RUmen-Derived Anaerobic Digester |
| IAP | Intermittent Aeration Process (for Waste Treatment) |