| Acronym | Definition |
|---|
| REO➣Real Estate Owned |
| REO➣Range Estimate Object |
| REO➣Ratio of Error Object |
| REO➣Radial Error Offset |
| REO➣Region Error Option |
| REO➣Result Evaluation Object |
| REO➣Resident Evil: Outbreak (video game) |
| REO➣Research Electro-Optics, Inc. (Boulder, CO) |
| REO➣Ransom Eli Olds (automobile manufacturer and namesake of the Oldsmobile and Reo brands; origin for band REO Speedwagon) |
| REO➣Rare Earth Oxide |
| REO➣Renewable Energy Objective (various locations) |
| REO➣Regional Education Office (various locations) |
| REO➣Regional Ecosystem Office |
| REO➣Regional Environmental Office |
| REO➣Regional Embassy Office (US State Department) |
| REO➣Regional Ecumenical Organization |
| REO➣Repair Engineering Order (aerospace) |
| REO➣Respiratory Enteric Orphan Virus |
| REO➣Reseau Educatif de l'Ontario (French) |
| REO➣Radar Electro-Optical |
| REO➣Radio Electronics Officer |
| REO➣Research Enterprise Office (Malaysia) |
| REO➣Residual Efficient Organization |
| REO➣Race Equality Officer |
| REO➣Resource Optimizer |
| REO➣Regional Economic Organisation |
| REO➣Receiver Eye Opening (ANSI) |
| REO➣Readiness Engineering Office/Officer |
| REO➣Radiated Emissions Test |