| Acronym | Meaning |
| PPH | Parts Per Hundred |
| CDW-IA | Continuum Distorted Wave-impulse Approxn. |
| NPOESS | National Polar Orbiting Environmental Satellite System |
| CSMCS | Carbon Species Methods Comparison Study |
| SQUID | Superconducting Quantum Interference Device |
| APM | Airborne Particulate Matter |
| MASER | Microwave Amplification By Stimulated Emission Of Radiation |
| DC | Blood-air Distribution Coefficient |
| CID | Collision-induced Dissociation |
| RIA | Reactivity Initiated Accident |