| Acronym | Meaning |
| RHFS | Restricted Hartree-Fock-Slater |
| TSM | Thickness Shear Mode |
| GEMS | General Energy And Material Balance System [model] |
| APMI | American Powder Metallurgy Institute |
| CAMEO | Computer Aided Management Of Emergency Operations |
| EBV | Epstein-Barr Virus |
| NHO | Natural Hybrid Orbital |
| VEO | Valence Electron Only |
| NRMS | Neutralization-reionization Mass Spectrometry |
| HMC | Human Mast Cell |