| Acronym | Meaning |
| TDSF | Time-dependent Spencer-Fano (in At. And Mol. Inelastic Collisions) |
| HTD | Hancock-Truhlar-Dykstra (potential Energy Surface) |
| NIH | National Institutes Of Health |
| MIC | Microbially Induced Corrosion |
| DRP | Dissolved Reactive Phosphorus |
| OCIS | OSHA Computerized Information System |
| RCT | Reference Control Technology |
| ESIC | Earth Science Information Center |
| FGD | Flue Gas Desulfurization |
| PHD | P-helicity Decoupling Scheme (p=momentum) |