| Acronym | Meaning |
| IER | Ion Exchange Resin |
| APSA | Advanced Photovoltaic Solar Array |
| SAGFET | Self-aligned Gate Field Effect Transistor |
| SRFA | Suwanee River Fulvic Acid |
| ETF | Extended Thomas-Fermi (model) |
| CSF | Configuration Spin Function (a Wave Function) |
| CHO | Complex Harmonic Oscillator (in Mol. Scattering Theory) |
| FIOH | Finnish Institute Of Occupational Health |
| LDEF | Long Duration Exposure Facility (for Spacecraft Material Testing) |
| TC-GME | Time-convolution Generalize Master Equation (in Quantum Tunneling Calcns.) |