| Acronym | Meaning |
| QAPP | Quality Assurance Project Plan |
| ELNES | Electron Energy-loss Near Edge Structure |
| BEST | Bare Essentials Of Surface Transfer |
| CFM | Central Field Model |
| ECTDMS | Electrochemical Thermal Desorption Mass Spectroscopy |
| HRT | Hormone Replacement Therapy |
| SPIPES | Spin Polarized Inverse Photoemission Spectroscopy |
| CDP | Contracted Density Product (in Simplification Of MO Calcns.) |
| LET | Linear Energy Transfer (in Spacecraft Power Systems) |
| MODS | Magneto-Optical Difference Spectroscopy |