| Acronym | Meaning |
 | TROLL | Transmitter And Receiver Of Laser Light |
| URA | Universities Research Association |
| PVAL | Polyvinyl Alcohol |
| UCM | Unresolved Complex Mixt. |
| CUSMAP | Conterminous United States Mineral Assessment Program |
| ESID | Electron Stimulated Ion Desorption |
| DARA | Disposal Area Remedial Action |
| HIPCO | High-pressure Carbon Monoxide |
| PF | Protective Factor |
| FGDIS | Flue Gas Desulfurization Information System |
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