| Acronym | Meaning |
| HRELS | High-resolution Electron Energy-loss Spectroscopy |
| GLAS | Geoscience Laser Altimeter System |
| NMIJ | National Metrology Institute Of Japan |
| CAS-SCF | Complete Active Space SCF (a CI-type Method) |
| 3A | Alumina Aluminide Alloys |
| PEG | Polyethylene Glycol |
| CASPT2 | Complete Active Space With Second-order Perturbation Theory |
| FQPA | Food Quality Protection Act |
| FP-MC | Finite Perturbation-multiconfigurational Method |
| GLISP | Great Lakes International Surveillance Plan |