| Acronym | Meaning |
| PEEP | Positive End-expiratory Pressure |
| RAO | Remedial Action Objective |
| REP | Radiological Emergency Planning |
| STAIRS | Storage And Information Retrieval System |
| ARPEFS | Angle-resolved Photoemission Extended Fine Structure |
| QSR | Quality Status Report (of North Sea Task Force) |
| IPWO | Interface Plane Wave Orbitals |
| NESHAP | National Emission Standards For Hazardous Air Pollutants |
| DASCO | Discriminant Analysis With Shrunken Covariances |
| EIGA | European Industrial Gases Association |