| Acronym | Meaning |
| EIS | Eikonal Initial State (in Scattering Calcns.) |
| HWIR | Hazardous Waste Identification Rule |
| PMP4 | (spin) Projected Moeller-Plesset Fourth-order (perturbation Theory) |
| MRLV | Mobile Raman Lidar Van |
| RSP | Respirable Suspended Particulates |
| STP | Standard Temperature And Pressure |
| ESPT | Electron Spin Polarization Transfer |
| QHE | Quantum Hall Effect |
| IGCP | International Geological Correlation Program |
| FCPC | Full-core Plus Correlation (calcn. Method) |