| Acronym | Meaning |
| EFVAO | Electric-field Variant Atomic Orbital |
| CP-LSDA | Car-Parrinello Local Spin Density Functional |
| PIES | Partial Integration Exterior Scaling (in Calcns. On Resonance Positions And Lifetimes |
| DTC | Differential Thermal Calorimetry |
| IPS | Inclined Plate Settler (for Wastewater Treatment) |
| TMA | Thermomechanical Analysis |
| IUCHF | Improved Uncoupled Hartree Fock |
| OPANA | Operational Version Of The Atm. Mesoscale Numerical Pollution Model |
| HY-CI | Hylleraas-configuration Interaction |
| ESE | Extended-surface Electrolysis |