| Acronym | Meaning |
| PCOP | Positron Correlation Polarization (potential) |
| ISC | Short-circuit Current |
| DFWM | Degenerate Four-wave Mixing |
| QCISDT | Quadratic CI (with) Single (and) Double (and) Triple (excitations) |
| KSA | Kirkwood Superposition Approximation |
| LMHEMT | Lattice Matched High Electron Mobility Transistor |
| EELS | Electron Energy Loss Spectroscopy |
| BSFC | Break Specific Fuel Consumption |
| SCDL | Short Cavity Dye Laser |
| HFB | Hybrid Fluidized Bed |