| Acronym | Meaning |
 | NPAH | Nitro-polycyclic Aromatic Hydrocarbon |
| MSIS | Mass Spectrometer And Incoherent Scatter |
| MPO | Metropolitan Planning Organization |
| CWD | Chronic Wasting Disease |
| OPAL | Omni-Purpose Apparatus At LEP |
| SPE | Solar Proton Event |
| PSPC | Position Sensitive Proportional Counter |
| RHFR | Relativistic Hartree-Fock-Roothaan |
| TSME | Two-state Molecular Expansion (method In Collisions Calcn.) |
| SXRAM | Scanning X-ray Analytical Microprobe |
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