| Acronym | Meaning |
 | PTA | Packed Tower Aeration |
| EMMA | Electron Microscopy And Microanalysis |
| FCF | Franck-Condon Factor |
| VHMS | Volcanic-hosted Massive Sulfide |
| PPG | Polypropylene Glycol |
| OPHF | Orbital-polarized Hartree-Fock |
| BRET | Breeder Reprocessing Engineering Test |
| JOSO | Joint Organization For Solar Observations |
| NEHA | National Environmental Health Association |
| IC | Integrated Circuit |
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