| Acronym | Meaning |
| NSTL | Near Surface Transition Layer |
| HELP | Hydrologic Evaluation Of Landfill Performance Model |
| MCM | Mesoporous Crystalline Material |
| TPR | Total Population Risk |
| VMD | Vector Meson Dominance |
| LPG | Liquefied Petroleum Gas |
| SFE | Stacking Fault Energy |
| IIR | Isobutylene Isoprene Rubber |
| BAEP | Brainstem Auditory Evoked Potentials |
| IGOSS | Integrated Global Ocean Services System |