| Acronym | Meaning |
| ATERIS | Air Toxics Exposure And Risk Information System |
| CSEM | Coherent Self-energy Method |
| RGS | Regulator Of G-protein Signaling |
| ORO | Office Of Regional Operations |
| FILDA | Fluorescence Intensity And Lifetime Distribution Analysis |
| HEED | High Energy Electron Diffraction |
| EGRET | Energetic Gamma Ray Experiment Telescope |
| OLPGAA | On-line Prompt Gamma-ray Activation Analysis |
| LOIS | Land-Ocean Interaction Study |
| CWFMS | Combined Wavelength And Frequency Modulation Spectroscopy |