| Acronym | Meaning |
| SEAMOS | Single-excitations-adapted Molecular Orbitals |
| HEIWIP | Heterojunction Interfacial Workfunction Internal Photoemission |
| APC | Anaphase-promoting Complex |
| SOM | Soil Organic Matter |
| USMAR | Upflow Static-Media Anaerobic Reactor |
| DEMA | Distributed Electromechanical Actuator |
| HEWL | Hen Egg White Lysozyme |
| GIWA | Global International Waters Assessment |
| NADP | National Atmospheric Deposition Program |
| VPM | Variable Phase Method (for Electron-atom Scattering Calcns.) |