| Acronym | Meaning |
| MR-RWA | Many Resonance-rotating Wave Approxn. |
| RINDO | Rydberg Intermediate Neglect Of Differential Overlap |
| NARE | North Atlantic Regional Experiment |
| QSRR | Quantitative Structure-retention Relationships |
| IUGG | International Union Of Geodesy And Geophysics |
| CSF | Configuration State Function (part Of Ci Wave Function) |
| SFRI | Sludge Filtration Resistance Index |
| HID | Helium Ionization Detector |
| SUMO | Small Ubiquitin-related Modifier |
| HCV | Hepatitis C Virus |