| Acronym | Meaning |
| PGE | Platinum Group Elements |
| VAZC | Vibrationally Adiabatic Zero Curvature (quantum Calcn. Approxn.) |
| PARS | Photoacoustic Raman Spectroscopy |
| IDI | Ion Dipole Induced (potential Term In Potential Energy Surfaces) See Also LEPS-IDI |
| MORTI | Mesopause Oxygen Rotational Temp. Imager |
| RIM | Reaction-injection Molding |
| PAL | Positron Annihilation Lifetime |
| LID | Laser Implant-deposition |
| RTG | Radioisotope Thermoelec. Generators |
| FADEC | Full Authority Digital Engine Control |