| Acronym | Meaning |
| SQRD | Square Root Darwin Term (correction To T And V Operator) |
| SPP | Suspended Particulate Phase |
| CLTVD | Controlled Low-temperature Vacuum Dehydration |
| NASQAN | National Stream Quality Accounting Network |
| ECBM | Extended Classical Over-barrier Model (in Calcns. On Inelastic Ion-atom Colisions) |
| AI | Artificial Intelligence |
| AHR | Airway Hyperresponsiveness |
| LHM | Longuet-Higgins-Murrell Approximation |
| MRLCC | Multireference Linearized Coupled Cluster |
| HTS | High Temperature Superconductor |