| Acronym | Meaning |
| ACEEE | American Council For An Energy Efficient Economy |
| SIR | Selected Ion Recording |
| AHM | Average Hamiltonian Model Method |
| OSM | US Office Of Surface Mining Reclamation And Enforcement |
| GHO | Generalized Hybrid Orbital (ao) |
| GVB-MDSA | Generalized Valence Bond-molecular Dynamics Simulated Annealing |
| PFC | Polarized Frozen Core Approximation |
| FSE | Fast Spin Echo |
| TBBA | Tightly-bound-on-the-bond Approxn. (band Structure Crystal) |
| CMC | Ceramic Matrix Composite |