| Acronym | Meaning |
 | AFV | Alternatively Fueled Vehicle |
| RTF | Replenished Tapped And Fractionated (magma) |
| HAD | Hollow Anode Discharge |
| QCFF/PI | Quantum Mechanical Consistent Force Field Method For Pi-electron Systems |
| MNSR | Miniature Neutron Source Reactor |
| G1 | Gaussian-one (theory For Calcg. Mol. Energies) |
| NLSD | Nonlocal Spin Density (functional Theory) |
| AACI | Association Of American Cancer Institutes |
| SOLSTICE | Solar Stellar Irradiance Comparison Experiment |
| INR | International Normalized Ratio |
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