| Acronym | Meaning |
| GFEMO | Generalized Free Electron Molecular Orbital |
| CLD | Certainly Lethal Dose |
| BRI | Building-related Illness |
| AQUIRE | Aquatic Information Retrieval |
| DFW | Diffusion Welding |
| SCC | Self-consistent Collective Coordinate (in Reactive Collisions) |
| OA | Office Of The Administrator |
| MCCHF | Multiconfiguration Coupled Hartree-Fock |
| CPT | Critical Pitting Temperature |
| TBBA | Tightly-bound-on-the-bond Approxn. (band Structure Crystal) |