| Acronym | Meaning |
| LVM-ST | Least-squares Variational Method (involving Only) Square-integrable (test Functions) (for Wave Functions In Scattering) |
| CCGF | Coupled Cluster Green Function |
| OBD | On-board Diagnosis |
| CSF | Carcinogenic Slope Factor |
| TNFR1 | Tumor Necrosis Factor Receptor 1 |
| ENA | Energetic Neutral Atoms (astronomical Plasmas) |
| IMCL | Intramyocellular Lipid |
| PSS | Perturbed Stationary State |
| MUCT | Multiphase Unsaturated Zone Contaminant Transport Model |
| FRSS | Federal Register Search System |