| Acronym | Definition |
|---|
| OOI➣Out of Ideas |
| OOI➣Onset of Immunity (vaccines) |
| OOI➣Ocean Observatories Initiative |
| OOI➣Out of Interest |
| OOI➣Other Operating Income (financial statements) |
| OOI➣Object Oriented Interface |
| OOI➣Object-Oriented Inspection |
| OOI➣Oilfield Operations Inc. |
| OOI➣Office of Organizational Improvement |
| OOI➣Osnabrück Openearedness Index |