| Acronym | Meaning |
 | MACHO | Massive Compact Halo Object |
| EDA | Emergency Declaration Area |
| NADP | National Atmospheric Deposition Program |
| OCIS | OSHA Computerized Information System |
| NEBLA | Non-equilibrium Boundary Layer Analysis |
| EC | European Community |
| RACT | Reasonably Available Control Technology |
| LCGO | Linear Combination Of Group Orbitals |
| PF | Polar Front |
| ECB | European Chemicals Bureau |
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