| Acronym | Meaning |
| HEGO | Heated Exhaust Gas Oxygen |
| STS | Space Transportation System |
| UCHF | Uncoupled Hartree-Fock |
| FITC | Fluorescein Isothiocyanate |
| HIT | Heparin-induced Thrombocytopenia |
| TPSA | Topological Surface Area |
| CCI | Chronic Constriction Injury |
| PACT | Process Automation Configuration Tool [EPRI Software] |
| HTMR | High Temperature Metal Recovery |
| CASS | Computer Assisted Stratification And Sampling |