| Acronym | Meaning |
| SCP-IOS | Semiclassical Perturbation-infinite Order Sudden |
| DAIRS | Differential Absorption Infrared Sensor |
| SIM | Standards Injection Module |
| CSEM | Coherent Self-energy Method |
| MOAG | MINDO Optimized Adjusted Geometries |
| PPCP | Pharmaceuticals And Personal Care Products |
| TOD | Theoretical Oxygen Demand |
| LSR | Liquid Silicone Rubber |
| NAME | Nuclear Accident Modeling Exercise [a Model] |
| RMC | Relativistic Multiconfiguration |