| Acronym | Meaning |
| IFPM | Independent Fermi Particle Model (in Atom-ion Impact Ionization) |
| TWA | Time-weighted Average Limit |
| LET | Linear Energy Transfer (in Spacecraft Power Systems) |
| TKN | Total Kjeldahl Nitrogen |
| HCOT | Helically Coiled Open Tube |
| CHIP | Cold And Hot Isostatic Pressing |
| IBAE | Ion Beam Assisted Etching |
| PFLT | Paint Filter Liquids Test |
| SVET | Scanning Vibrating Electrode Technique |
| SDGUGA | Shape-driven Graphical Unitary Group Approach |