| Acronym | Meaning |
| RASA | Regional Aquifer Systems Analysis (program Of USGS) |
| COPNA | Condensed Polynuclear Aromatics |
| EMP | Electrostatic Molecular Potential (for Electronic-structure) |
| CCFL | Countercurrent Flow Limitation |
| ICU | Intensive Care Unit |
| FI | Fouling Index |
| DI | Direct Injection (engine; Diesel) |
| WTE | Waste-To-Energy Facility |
| AMPTE | Active Magnetosphere Particle Tracer Explorers |
| ISIS | Industrial Site Information System |