| Acronym | Meaning |
| EAP | Environmental Action Plan |
| PNO-CEPA | Pseudonatural Orbital-coupled Electron Pair Approximation |
| SULEV | Super Low Emission Vehicle |
| SCM | Shell-correction Method (in Calcns. For Metal Clusters) |
| STOVL | Short Take-Off And Vertical Landing |
| HCS | Hazard Communication Standard |
| ADEOS | Advanced Earth Observing Satellite |
| IAVI | International AIDS Vaccine Initiative |
| LCOAO | Linear Combination Of Orthogonal Atomic Orbitals |
| BGE | Background Electrolyte |