| Acronym | Meaning |
| BTGA | Best Technology Generally Available |
| LIMA | Laser-induced Ion-mass Analyzer |
| CLS | Classical Least-squares |
| CDS | Compliance Data System (US EPA Air Database) |
| KBDS | Knowledge-based Design System |
| CMSA | Consolidated Metropolitan Statistical Area |
| EEE | Exoelectron Emission |
| RPO | Resonant Periodic Orbit (on Potential Energy Surface In At. Or Mol. Scattering) |
| SUSYQM | Supersymmetric Quantum Mechanics |
| CASAC | Clean Air Scientific Advisory Committee (US EPA) |