| Acronym | Meaning |
| LET | Linear Energy Transfer (in Spacecraft Power Systems) |
| HATR | Horizontal Attenuated Total Reflection |
| EFH | Extended Fenske-Hall (LCAO MO Method) |
| EM | Enriched Mantle |
| IDMA | Isotopic Dilution And Mass Analysis |
| ASHES | Axial Seamount Hydrothermal Emissions Study |
| WILT | Waste Interface Leaching Test |
| CERT | Const. Extension Rate Tensile |
| NDR | Neg. Differential Resistance |
| SERDS | Shifted Excitation Raman Difference Spectroscopy |