| Acronym | Meaning |
| MEHT | Modified Extended Hueckel Theory |
| ORPA | Optimized Random Phase Approximation |
| MERD | Mine Emergency Responsiveness Development |
| FAB | Fast Atom Bombardment (mass Spectrometry) |
| BNF | Biological Nitrogen Fixation |
| NFRAP | No Further Remedial Action Planned |
| LMDPE | Linear Medium Density Polyethylene |
| PDVSA | Petroleos De Venezuela |
| SOLSE | Shuttle Ozone Limb Sounding Experiment |
| AFGF | Acidic Fibroblast Growth Factor |