| Acronym | Meaning |
| PF | Polar Front |
| SCLC | Space Charge Limited Current |
| PCS | Photon Correlation Spectroscopy |
| PCF | Plasma Centrifugal Furnace |
| PT | Perturbation Theory |
| APHA | American Public Health Association |
| RFM | Relativistic Mean Field |
| P-T-T-D | Pressure-temperature-time-deformation Path (for Metamorphic Rocks) |
| IAM | Independent Atom Model |
| TEELS | Transmission Electron Energy Loss Spectroscopy |