| Acronym | Meaning |
| SP-RPAE | Spin Polarized-random Phase Approxn. (with) Exchange |
| MLE | Maximum Likelihood Estimate |
| CSF | Configuration Spin Function (a Wave Function) |
| BHT | Bottom-hole Temperature |
| PDEA | Preliminary Draft Environmental Assessment |
| STOIC | Stratospheric Ozone Intercomparison Campaign |
| ECT | Ergodic Collision Theory |
| AGCM | Adiabatic Generator Coordinate Method (for Energy Level Calcn.) |
| ROESY | Rotating-frame Overhauser Enhancement Spectroscopy |
| HRBS | High Resolution Rutherford Backscattering |