| Acronym | Meaning |
| QED | Quantum Electrodynamics |
| AWS | American Welding Society |
| RSC | Residual Sodium Carbonate |
| TIME | Transferred Ionized Molten Energy Process (for Metal Arc Welding) |
| NCS | Notification Of Compliance Status |
| GWPS | Groundwater Protection Strategy |
| CDA | Charge Density Analysis |
| AQDM | Air Quality Display Model |
| SCBSA | Self-consistent Boundary-site Approxn. (for D.-of-states) |
| USEPA | United States Environmental Protection Agency |