| Acronym | Meaning |
| CPSSR | Coulomb-repulsion Perturbed Stationary State With Relativistic Effects |
| ODU | Optical Density Units |
| IAPPS | International Association For The Plant Protection Sciences |
| LREE | Light Rare Earth Element(s) |
| MIH | Method Of Intermediate Hamiltonians |
| ARPA | Advanced Research Projects Agency |
| WRV | Water Retention Value [of Cellulose Pulps For Paper Manufacture] |
| HSEES | Hazardous Substances Emergency Events Surveillance |
| RDS | Respiratory Distress Syndrome |
| TNF | Tumor Necrosis Factor |