| Acronym | Meaning |
| VLF | Very Low Frequency (radiowaves) |
| LTA | Linde Type A |
| TCR | T Cell Receptor |
| SEHF | Spin-extended Hartree-Fock |
| MCH | Melanin Concentrating Hormone |
| CPR | Cytochrome P 450 Reductase |
| PCM | Phase Contrast Microscopy |
| LICS | Laser-induced Continuum Structure |
| HHS | Health And Human Services Department |
| UAMO | Unprojected Alternant Molecular Orbital |