| Acronym | Meaning |
| PREEN | Pacific Rim Energy And Environment Network |
| AIM | Adiabatic Invariance Method (in Ion-mol. Reactions) |
| MOT | Magnetooptical Trap |
| IAP | Intermittent Aeration Process (for Waste Treatment) |
| GDIM | Generalized Diatomics-in-molecules (theory) |
| EEA | Energy And Environment Analysis |
| POA | Peierls-Onsager Approxn. (in Electronic Structure Calcns.) |
| PVB-CSF | Projected Valence Bond-configuration State Function |
| CI | Configuration Interaction |
| GRWA | Generalized Rotating-wave Approxn. (in Energy Level Calcns.) |