| Acronym | Meaning |
| PACS | Physics And Astronomy Classification Scheme |
| FHCP | Federal Hazard Communication Program |
| FNO | Frozen Natural Orbital |
| SPARPES | Spin Polarized Angle-resolved Photoelectron Spectroscopy |
| PERTCI | Perturbational Configuration Interaction |
| RNRA | Resonant Nuclear Reaction Analysis |
| ARC | AIDS-related Complex |
| RMRCI | Relativistic MR-CI |
| OCC | Organochlorinated Compound |
| EGS | Echelle Grating Spectrometer |