| Acronym | Definition |
|---|
| CEO | Chief Executive Officer (corporate title) |
| CEO | Center for Effective Organizations |
| CEO | Catholic Education Office (Australia) |
| CEO | Collegiate Entrepreneurs' Organization |
| CEO | Civil Enforcement Officer (UK) |
| CEO | Chief Electoral Officer (Elections Canada) |
| CEO | Corporate Europe Observatory |
| CEO | Corporate Executive Officer (less common) |
| CEO | Code Enforcement Officer |
| CEO | Continuing Education Online |
| CEO | Center for Equal Opportunity |
| CEO | Central Europe Online |
| CEO | Chief Ethics Officer (corporate title) |
| CEO | Cutting Edge Optronics |
| CEO | Crew Earth Observations |
| CEO | Centre for Earth Observation |
| CEO | Consulting Engineers of Ontario |
| CEO | Chairman and Executive Officer |
| CEO | Clinical and Economic Outcomes |
| CEO | Center for Earth Observation |
| CEO | Chief Entertainment Officer (corporate title) |
| CEO | Creative Energy Options |
| CEO | Council for Economic Outreach |
| CEO | Civil Engineering Operations |
| CEO | Chambre Economique de l'Ontario |
| CEO | Continuing Education Option |
| CEO | Cleaved Edge Overgrowth |
| CEO | Confederación Empresarial de Ourense (Spain) |
| CEO | Centre for Ethical Orientation |
| CEO | Commonwealth Employment Opportunities (Massachusetts) |
| CEO | Comprehensive Electronic Office (software) |
| CEO | Christmas and Easter Only (church attendance) |
| CEO | Celestial Ephemeris Origin (astronomy) |
| CEO | Communications-Electronics Officer |
| CEO | Collège Européen d'Orthodontie (French: European College of Orthodontics) |
| CEO | Cornell Entrepreneur Organization |
| CEO | Canine Enforcement Officer |
| CEO | Commonwealth Education Organization (Pittsburgh, PA) |
| CEO | Club Europe Oric (computer club; France) |
| CEO | Comité Européen de l'Outillage (French: Association of European Tool Manufacturers) |
| CEO | Chinese-American Elected Officials |
| CEO | Cheat Every One |
| CEO | Centre d'Études Olympiques (French: Olympic Studies Center; Switzerland) |
| CEO | Commissaire à l'Environnement de l'Ontario (French: Ontario Environment Commissioner; Ontario, Canada) |
| CEO | Cooperative Extension and Outreach |
| CEO | Common Extensor Origin |
| CEO | Casualty Evacuation Officer |
| CEO | Central Engine Overhaul |
| CEO | Christians Encouraging Others |
| CEO | Center for Electro-Optics |
| CEO | Configuration Engineering Office |
| CEO | Creative Engineering Options, Inc. |
| CEO | Commission de l'Europe Occidentale (French: Commission of Western Europe) |
| CEO | Convoy Escort Oiler |
| CEO | Campus Economic Organization |
| CEO | Community Enforcement Officer |
| CEO | Campus Equipment Outfitters |
| CEO | Combine Expensive Operations |
| CEO | Challenge English Online |
| CEO | Centrum Edukacji Obywatelskiej (Polish: Center for Civic Education) |
| CEO | Community Education and Outreach (various organizations) |
| CEO | Child Exploitation and Obscenity |