| Acronym | Meaning |
| RECP | Relativistic Effective-core Potential |
| HSC | Health And Safety Commission (UK) |
| ABG | Arterial Blood Gas |
| DESPOT | Driven-equilibrium Single-pulse Observation Of T1 |
| CCPA | Cellular Coherent-potential Approximation (for Electronic Structure Calcns.) |
| SPG | Sequential Product (of) Geminals |
| ICM | Institute For Crisis Management |
| SCEP | Self-consistent Electron-pair Theory |
| HEV | Hepatitis E Virus |
| WADR | Waste Acid Detoxification And Reclamation |