| Acronym | Meaning |
| ISSI | International Society For Scientometrics And Informetrics |
| BRNO | Best Radial Natural Orbital |
| PREM | Preliminary Ref. Earth Model |
| QCR | Quartz Crystal Resonator |
| SOEH | Scaled One-electron Hamiltonian (in SCF Calcns. On Mols.) |
| EFC | European Federation Of Corrosion |
| ENFET | Enzyme Field-effect Transistor |
| PO-TDSE | Periodic Orbit-time Dependent Schroedinger Equation |
| ERIC | Educational Resources Information Center |
| ARC | Accelerating Rate Calorimetry |