| Acronym | Definition |
|---|
| OEO | Office of Equal Opportunity |
| OEO | Office of Economic Opportunity |
| OEO | Optical Electrical Optical |
| OEO | Optical-to-Electrical-to-Optical |
| OEO | Office of Enforcement Operations (Federal Bureau of Prisons) |
| OEO | Optical and Electro-Optical |
| OEO | Organic Essential Oils |
| OEO | Operations Evaluation Office |
| OEO | Office of Emergency Operations (FDA and DOE) |
| OEO | Office Equipment Outlet |
| OEO | Other Expeditionary Operations (USMC) |
| OEO | Office of Energy Outreach |
| OEO | Online Editorial Outreach (internet content developers) |
| OEO | Officers' Eyes Only |
| OEO | Cambodian Orphan and Education Organization (est. 2010) |
| OEO | Omega Epsilon Omega |