| Acronym | Meaning |
| SPO | Spin Projection Operator |
| CAMD | Computer-aided Molecular Design |
| TPR | Temperature-programmed Reduction |
| SMP | Submitochondrial Particle |
| PADMR | Photoinduced Absorption Detected Magnetic Resonance |
| VARTM | Vacuum Assisted Resin Transfer Molding |
| SETB | Semiempirical Tight Binding |
| SMM | Single-molecule Magnet |
| WLIMS | Wet Low Intensity Magnetic Separation |
| SMO | Sample Management Office (US EPA) |