| Acronym | Meaning |
| PCM | Phase Contrast Microscopy |
| NMN | Nicotinamide Mononucleotide |
| AFC | Assimilation (with) Fractional Crystallization (geochemistry) |
| DELPHI | Detector With Lepton |
| RIOSA | Reactive Infinite-order Sudden Approxn. |
| RCI | Relativistic Configuration Interaction |
| STODI | Slater-type Orbital-point Dipole Interaction (in Mol. Polarizability Calcns.) |
| BIG/GT | Biomass Gasifier/gas Turbine (for Steam/electricity Cogeneration) |
| DPF | Diesel Particulate Filter |
| NMRI | Nuclear Magnetic Resonance Imaging |