| Abbreviation | Definition |
|---|---|
| OSCE | Objective Structured Clinical Examinations |
| OSLM | Optical Service Level Management (LuxN) |
| OSU | Observational Stimulation Unit |
| OTT | Over The Top |
| OV | Origin Variable |
| OVL | Ocean Virtual Laboratory |
| OWL | Open Ware Laboratory |
| OXR | Orthochromatic Medical X-ray Film |
| OXY | Oxygen |
| OZR | OZone bottle Rinser |
| P | Phosphorus |
| PAAG | Hydrophilic PolyAcrylamide Gel |
| PABA | Para-Aminobenzoic Acid |
| PAC | Personal Access Code |
| PAC | Pharmaceutically Active Compound |
| PACL | Palo Alto CARET Laboratory |
| PAG | Protein Advisory Group |
| PAGE | polyacrylomide gel electrophoresis |
| PAI | Plasminogen Activator Inhibitor |
| PAL | Physicians Automated Laboratory |