| Acronym | Meaning |
 | EAPFS | Extended Appearance-potential Fine-structure Spectroscopy |
| VRIOSA | Vibrational/rotational Infinite-order Sudden Approximation |
| NARSTO-NE-OP | North American Research Strategy For Tropospheric Ozone-Northeast Oxidant And Particle Study |
| PRESTO | Prediction Of Radiological Effects To Shallow Trench Operation |
| RFP | Reasonable Further Progress |
| CLIA | Chemiluminescence Immunoassay |
| PINN | Proposed International Nonproprietary Names (for Drugs) |
| MPIF | Myeloid Progenitor Inhibitory Factor |
| ABTS | 2,2'-azinobis(3-ethyl-benzthiazoline-6-sulfonic Acid) |
| PBO | Polarized Born-Oppenheimer |
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