| Acronym | Meaning |
| FOPIM | First Order Perturbation Iteration Method |
| DDRPA | Double Direct Random Phase Approximation |
| DRAW | Digital Read After Write |
| NMO | Natural Magnetic Orbital |
| SICP | Sealed Inductively Coupled Plasma |
| LSF | Laser-saturated Fluorescence |
| SCR | Solar Cosmic Rays (related To Spacecraft And Space Travel) |
| INCRA | International Cooper Research Association |
| PEMC | Pair-excitation Multiconfiguration (type Of Wave Function) |
| TSDF | Treatment, Storage, And Disposal Facility |