| Acronym | Meaning |
 | PDR | Photon-dominated Region |
| ABR | Auditory Brainstem Response |
| UMP | Uridine 5'-phosphate |
| NPA | Natural Population Analysis (for Electron Configuration Of Mols.) |
| CAN | Cellulose Acetate Nitrate |
| STT | Surface Tension Transfer |
| PMC | Permanently Manned Capability (of Space Station) |
| ASPRS | American Society Of Photogrammetry And Remote Sensing |
| FR | Federal Register |
| CLC | Clean Lakes Clearinghouse |
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