| Acronym | Meaning |
| SPHINCS | Sequential PHoton Interrogation And Neutron Counting Signatures |
| CIMI | Configuration Interaction From Molecular Integrals |
| SDI | Silt Density Index |
| PAR | Photosynthetically Active Radiation |
| MVEG | Motor Vehicle Emissions Group |
| SC | Surface Capacitance |
| ELCD | Electrolytic Conductivity Detection |
| FCSA | Frequency-corrected Sudden Approxn. (in Mol. Collision Calcns.) |
| RFGE | Rotating-field Gel Electrophoresis |
| CID | Configuration Interaction With Double Substitution |