| Acronym | Meaning |
| PM3 | Third-parametric Method |
| PCCS | Phase-corrected Coupled-states (approxn. For Scattering Calcns.) |
| SPPD | Spin Polarized Photoelectron Diffraction |
| MESQUAC-MO | Mixed Electrostatic Quantum Chemical Calculation-MO |
| AS | Absorption Spectroscopy |
| CPR | Cardiopulmonary Resuscitation |
| MSMO | Multiple Scattering Molecular Orbital Method (also Known As X(alpha) Scattered-wave) |
| BLS | Bureau Of Labor Statistics |
| MAESA | Measurements For Assessing The Effects Of Stratospheric Aircraft |
| NSCP | North Sea Community Program |