| Acronym | Meaning |
| FLCAO | Factorized LCAO |
| PAC | Perturbed Angular Correlation |
| HPIC | High-performance Ion Chromatography |
| OGDR | Optogalvanic Double Resonance |
| MRI | Magnetic Resonance Imaging |
| SCPP | Self-consistent Polarization Propagator |
| BSO | Basic Symmetric Operator (in Second-quantization Calculations) |
| ABSORB | Arctic Beaufort Sea Oilspill Research Body |
| CARS | Corrective Action Reporting System (now Known As RCRIS) |
| IRIS | Integrated Risk Information System |