| Acronym | Meaning |
| OSAC | Organic Structures Accessed By Computer |
| BMDO | Ballistic Missile Defense Organization |
| MTPE | Mission To Planet Earth |
| LEEM | Low-energy Electron Microscopy |
| HMG-COA | 3-hydroxy-3-methylglutaryl Coenzyme A |
| MPD | Maximum Permissible Dose |
| ACWA | American Clean Water Association |
| GRIDS | Geographic Resources Information And Data System |
| ECISDT | Size-extensive CI With Single And Double And Triple Excitations |
| OFA | Oil Fly Ash |