| Acronym | Meaning |
| IUAPPA | International Union Of Air Pollution Prevention Associations |
| PCI | Percutaneous Coronary Intervention |
| PCPI | Permanent Committee On Patent Information |
| ROI | Reactive Oxygen Intermediate |
| ECETOC | European Chemical Industry |
| QCMD | Quantum-classical Mol. Dynamics |
| SORCE | Solar Radiation And Climate Experiment |
| EBPVD | Electron Beam Physical Vapor Deposition |
| MTES | Metastable Transfer Emission Spectroscopy |
| FERST | Facility For Environmental Remote Sensing And Test |