| Acronym | Meaning |
| BRDF | Bidirectional Reflectance Distribution Function |
| AIGER | American Industry Government Emissions Research Consortium |
| CGR | Coliform Growth Response |
| DBTT | Ductile-to-brittle Transition Temperature |
| COPD | Chronic Obstructive Pulmonary Disease |
| REPELS | Reemitted Positron Energy Loss Spectroscopy |
| EPA | Environment Potential Approach (in Electronic-structure Calcn.) |
| RONALD | Rocketborne Optical Neutral Gas Analyzer With Laser Diodes |
| ITD | Ion Trap Detector (mass Spectrometry) |
| ERAST | Environmental Research Aircraft And Science Technology |