| Acronym | Meaning |
| HEC | Hydrogen Embrittlement Cracking |
| MLTCS | Mesosphere-lower Thermosphere Coupling Study |
| DERP | Defense Environmental Restoration Program |
| DDMO | Differential Density Matrix Overlap (index |
| EPR | East Pacific Rise |
| GMCC | Geophysical Monitoring For Climate Change |
| RFA | RCRA Facility Assessment |
| EMG | Exponentially Modified Gaussian |
| PSCC | Pseudostate Close Coupling |
| SNAP | Significant New Alternative Policy |