| Acronym | Meaning |
| HFF | Hellmann-Feynman Force Approximation |
| PSA | Pressure Swing Adsorption (gaseous Waste Treatment) |
| SPLITT | Split-flow Thin [fractionation] |
| CSC | Client Server Computing |
| EBIS | Electron-beam Ion Source |
| TSR | Thermal Shock Resistance |
| VF | Valence Force (model In Bond Properties Calcns. In Solids) |
| BAFF | B-cell Activating Factor |
| DHF | Derivative Hartree-Fock (quantum Theory In Calcns. On Mols.) |
| EFP | Explosively Formed Projectile |