| OEI | Oates Energy Inc
| Others |
| OEI | Obesity Education Initiative
| Others |
| OEI | Object Event Indemnity
| Others |
| OEI | Observed Experiential Integration
| Others |
| OEI | Office of Education Innovation
| Others |
| OEI | Office of Energy Initiatives
| Others |
| OEI | Office of Enterprise Information
| Others |
| OEI | Office of Environmental Information
| Others |
| OEI | Office of Equity and Inclusion
| Others |
| OEI | Office of Evaluation and Inspections
| Others |
| OEI | Official Establishment Inventory
| Others |
| OEI | Okoboji Entrepreneurial Institute
| Others |
| OEI | One Engine Inoperative
| Others |
| OEI | Online Education Initiative
| Others |
| OEI | Open Enterprise Infrastructure
| Others |
| OEI | Open Extract Image
| Others |
| OEI | Original Equipment Industries
| Others |
| OEI | Other Eligible Individual
| Others |
| OEI | Outside Equity Interest
| Others |
| OEI | Overview Effects Infrastructure
| Others |