| Acronym | Meaning |
 | DWFBA | Distorted-wave First-order Born Approximation |
| NOD | Nitrogenous Oxygen Demand |
| ND | Nitrification Denitrification |
| AFRL | Air Force Research Laboratory |
| SPQC | Series Piezoelectric Quartz Crystal |
| SIBFA | Sum (of) Interactions Between Fragments (computed) Ab Initio |
| VLBI | Very Long Baseline Interferometry |
| HOC | Hydrophobic Organic Compounds |
| AGCI | Aspen Global Change Institute |
| SLR | State And Local Relations |
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