| Acronym | Meaning |
| MIOSA | Modified (rotational) Infinite Order Sudden Approxn. |
| DZD | (double Zeta)-diffuse (basis Set In Configuration-mixing MO Calcns. On Mols.) |
| SEESR | Simultaneous Electrochemical-electron Spin Resonance |
| AGP | Antisymmetrized Geminal Product (wave Function) |
| NURE | National Uranium And Resource Evaluation |
| DRO | Diesel-range Organics |
| SDA | Subsurface Disposal Area |
| UA | Unequilibrated Aggregate (interplanetary Dust Particle) |
| PNEC | Predicted No-effect Concentration |
| SWSA | Solid Waste Storage Area |