| Acronym | Meaning |
| GTG | Gaussian-type Geminal |
| PCR | Photo-Conductive Resonance |
| MQED | Molecular Quantum Electrodynamics (calcn. Method) |
| NAPCA | National Air Pollution Control Administration |
| TRIPS | Trade-Related Aspects Of Intellectual Property Rights |
| MAOP | Maximum Allowable Operating Pressure |
| USDI | US Department Of Interior |
| NRAO | National Radio Astronomy Observatory |
| HMXB | High-mass X-ray Binaries |
| TRS | Total Reduced Sulfur |