| Acronym | Meaning |
| LDC | Less Developed Countries |
| MMPC | Metal-matrix Particulate Composites |
| ALS | Autonomous Listening Station |
| EHAP | Extremely Hazardous Air Pollutant |
| VTZ | Valence Triple Zeta (basis Set) |
| PCI | Perturbative Configuration Interaction |
| IRED | Ion Radiation-enhanced Diffusion |
| ARAS | Atomic Resonance Absorption Spectroscopy |
| NEIC | National Enforcement Investigations Center |
| RAFA | Rank Annihilation Factor Analysis |