| Acronym | Meaning |
| EDQNM | Eddy-damped Quasinormal Markovian [mathematics In Engineering] |
| MNDOD | Modified Neglect Of Diatomic Overlap With D At. Orbitals |
| IEM | Interstitial Electron Model |
| T-GAS | Trace Gas Accounting System |
| RTDM | Rough Terrain Dispersion Model (air Quality) |
| CCCC | Complex-coordinate Coupled-channel (method In Calcns. On Rotational And Vibrational Predissocn.) |
| LRAD | Long-range Alpha Detection |
| ETP | Environmental Tracking Procedure |
| SAI | Spline-fitted Ab Initio (potential Energy Surface) |
| APS | Aerodynamic Particle Sizer |