| Acronym | Meaning |
 | OES | Occupational Exposure Standard |
| CVFF | Consistent Valence Force Field |
| PTD | Probable Toxic Dose |
| ZAP | Zone Axis Pattern |
| NODP | National Oceanic And Deposition Program |
| NPS | National Park Service (US) |
| DAW | Dry Active Waste |
| TDGI | Time-dependent Gage-invariant (quantum Calcn. Method) |
| BSE | Bulk Silicate Earth |
| HECD | Hot Electron Capture Dissociation |
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