| Acronym | Meaning |
| WCUB | Wang Chang-Uhlenbeck-de Boer (quantum-mech. Relation In Rotational Relaxation Calcn.) |
| MPO | Modified Polarized Orbital |
| GRID | Global Resources Information Database |
| HSRC | Hazardous Substance Research Center |
| NSIDC | National Snow And Ice Data Center (University Of Colorado) |
| GMP | Guanosine 5'-monophosphate |
| NADA | New Animal Drug Application |
| IAWPRC | International Association For Water Pollution Research And Control |
| SDF | Spin(-unrestricted) Density Functional |
| CAEC | Center For Analysis Of Environmental Change |