| Acronym | Meaning |
| RTCDW | Relativistic Target Continuum Distorted Wave (approxn. For Electron Capture In Ion-atom Collisions) |
| OTIS | One-dimensional Transport With Inflow And Storage |
| ANMO | Average-natural Molecular Orbital |
| CWM | Coal Water Mixture |
| TCLE | Thermal Coefficient Of Linear Expansion |
| IRI | Interfaculty Reactor Institute |
| HASI | Huygens Atmospheric Structure Instrument |
| BCRNM | Bending Corrected Rotating Nonlinear Model |
| PEUF | Polyelectrolyte Enhanced Ultrafiltration |
| GISPRI | Global Industrial And Social Progress Institute (Japan) |