| Acronym | Meaning |
| DMW | Dissimilar-metal Weld |
| BTDC | Before Top Dead Center |
| EPMA | Electron Probe Microanalysis |
| QPD | Quadrature Phase Detection |
| HWSFD | Hazardous Waste Superfund Database |
| OMPW | Orthogonalized Modulated Plane Wave (wave Function) |
| EPSP | Excitatory Postsynaptic Potential |
| BTV | Breakthrough Volume (sorption Capacity Measurement) |
| ECR | Electron Cyclotron Resonance |
| SCM | Spherical Cellular Model |