| Abbreviation | Definition |
|---|---|
| OeAW | sterreichische Akademie der Wissenschaften |
| OEDS | Ontario Economic Development Society |
| OEGGG | Austrian Society for Gynaecology and Obstetrics |
| OEGGG | Österreichische Gesellschaft für Gynäkologie und Geburtshilfe |
| OEGGG | sterreichische Gesellschaft fr Gynkologie und Geburtshilfe |
| OEGN | Austrian Society for Neurology |
| OEGN | Österreichische Gesellschaft für Neurologie |
| OEGN | sterreichische Gesellschaft fr Neurologie |
| OEGS | Old English Goat Society |
| OEGS | Old Etonian Golfing Society |
| OERS | Oceanographic Environmental Research Society |
| OES | Oceanic Engineering Society |
| OF | Ordem dos Farmacêuticos |
| OF | Ordem dos Farmacuticos |
| OF | Portuguese Pharmaceutical Society |
| OFCS | Online Film Critics Society |
| OFS | Organization for a Free Society |
| OFSS | Operation Friendship Seniors Society |
| OGBS | Open Green Building Society |
| OGDS | Oakleigh Garden District Society |