| Abbreviation | Definition |
|---|---|
| ODAS | Oceanographic Data Acquisition System |
| ODP | Ocean Drilling Program |
| ODP | Ozone Depletion Potential |
| ODSN | Ocean Drilling Stratigraphic Network |
| ODW | Omega Dropwindsonde |
| OECD | Organization for Economic Co-operation and Development |
| OEMP | Office of Environmental Monitoring and Prediction |
| OEP | Office of Emergency Preparedness |
| OEP | Office of Environmental Policy |
| OEQ | Ocean Ecology Quotient |
| OERD | Ocean Environment Research Division |
| OFAM | Ocean Forecasting Australia Model |
| OFCCP | Oceanic Fisheries and Climate Change Project |
| OFCM | Office of the Federal Coordinator for Meteorology |
| OFS | Office of Oceanographic Facilities and Support |
| OGCM | Ocean General Circulation Model |
| OGMSA | Office of Global Maritime Situational Awareness |
| OGP | Office of Global Programs |
| OHC | Ocean Heat Content |
| OHD | Office of Hydrologic Development |