| Acronym | Meaning |
| HHE | Health Hazard Evaluation |
| PAIR | Patent Application Information Retrieval System |
| PMP | Peroxisomal Membrane Protein |
| PCP | Pentachlorophenol (Reg: 87865) |
| GESAMP | Group Of Experts On The Scientific Aspects Of Marine Pollution |
| APSG | Antisymmetrized Product Of Strongly Orthogonal Geminals (variant Of Multiconfiguration Self-consistent Field Method) |
| PPN | Peroxypropionyl Nitrate |
| COED | Computer Optimized Experimental Design |
| FSH | Follicle-stimulating Hormone |
| ARIPES | Angle-resolved Inverse Photoemission Electron Spectroscopy |