| Acronym | Meaning |
| AAPCO | Association For American Pesticide Control Officials |
| PERL | Passivated Emitter And Rear Locally Diffused (solar Cells) |
| DPSS | Diode-pumped Solid-state |
| PTSPGF | Perturbative-type Single-particle Green Function |
| PARC | Polycyclic Aromatic Ring Cleavage |
| P-T-T-D | Pressure-temperature-time-deformation Path (for Metamorphic Rocks) |
| FSR | Free Spectral Range |
| MODS | Magneto-Optical Difference Spectroscopy |
| OES | Occupational Exposure Standard |
| SARA | Superfund Amendments And Reauthorization Act Of 1986 |