| Acronym | Definition |
|---|
| CEI➣Competitive Enterprise Institute |
| CEI➣Commission Électorale Indépendante (French: Independent Electoral Commission; Côte d'Ivoire) |
| CEI➣Conferenza Episcopale Italiana (Italian bishop conference) |
| CEI➣Critical Elements of Information (US FEMA) |
| CEI➣Consolidated Edison, Inc. (New York) |
| CEI➣Comitato Elettrotecnico Italiano (Italian Electrotechnical Committee) |
| CEI➣Comunidad de Estados Independientes (Spanish: Commonwealth of Independent States) |
| CEI➣Corporate Equality Index |
| CEI➣Common Event Infrastructure (IBM) |
| CEI➣Central European Initiative |
| CEI➣Commission Électrotechnique Internationale (French: International Electrotechnical Commission; est. 1906; Switzerland) |
| CEI➣Converting Enzyme Inhibitor |
| CEI➣Civil Engineering Institute (various locations) |
| CEI➣Connection Endpoint Identifier |
| CEI➣Career Education Institute |
| CEI➣Civic Engagement Initiative (various organizations) |
| CEI➣Consejo Espirita Internacional (Spanish: International Spiritist Council) |
| CEI➣Chip Enable Input |
| CEI➣Centro de Estudios Internacionales (Spanish: Center for International Studies; Spain) |
| CEI➣Coastal Enterprises, Inc. |
| CEI➣Cleveland Electric Illuminating |
| CEI➣Creative Economy Initiative (various locations) |
| CEI➣Confédération Européenne de l'Immobilier (French: European Confederation of Real Estate Agents; Belgium) |
| CEI➣Computational Engineering International |
| CEI➣Christian Education Institute (Hawaii) |
| CEI➣Coincident Economic Indicator (statistics) |
| CEI➣Currency Exchange International (various locations) |
| CEI➣Czech Environmental Inspectorate (est. 1991) |
| CEI➣Clean Energy Initiative |
| CEI➣Center for Entrepreneurship and Innovation (University of Florida) |
| CEI➣Centro de Enriquecimiento de la Inteligencia (Guatemala) |
| CEI➣Centre d'Echanges Internationaux (French: International Exchange Center) |
| CEI➣Cross Enterprise Integration (software) |
| CEI➣Construction Engineering & Inspection |
| CEI➣Certified Elevator Inspector (Department of Business and Professional Regulation; Florida) |
| CEI➣Comparably Efficient Interconnection |
| CEI➣Computer Education Institute |
| CEI➣Compliance Evaluation Inspection |
| CEI➣Consumer Education Initiative (recycling) |
| CEI➣Civilian Employment Information (US DoD) |
| CEI➣Chiang Rai, Thailand - Chiang Rai (Airport Code) |
| CEI➣Connection Endpoint Identifier (UNI 3.0) |
| CEI➣Center for Emerging Issues |
| CEI➣Course Evaluation Instrument |
| CEI➣Contract End Item |
| CEI➣Cochrane Ecological Institute (Canada) |
| CEI➣Centre d'Etudes Interaméricaines (French: Interamerican Studies Center; Canada) |
| CEI➣Conducted Electromagnetic Interference |
| CEI➣Call for Expression of Interest |
| CEI➣Computer Ed Institute (various locations) |
| CEI➣Council of Engineering Institutions |
| CEI➣Critical Employment Indicator (US DoD) |
| CEI➣Centre d'Entreprises et d'Innovation (French: Center for Business Innovation; est. 1988) |
| CEI➣Coastal Environments Inc |
| CEI➣Cholinesterase Inhibitor |
| CEI➣Combustion Engineering Inc. |
| CEI➣Certified Enterprise Integrator (Society of Manufacturing Engineers certification) |
| CEI➣Committee on Environmental Improvement |
| CEI➣Certified Electrical Inspector (International Association of Electrical Inspectors) |
| CEI➣Configuration End Item (NASA) |
| CEI➣Comparatively Efficient Interconnection |
| CEI➣Communications & Entertainment Inc. (Atlanta, GA) |
| CEI➣Collège d'Enseignement en Immobilier (French: College of Education in Real Estate; Quebec, Canada) |
| CEI➣Centennial Energy Institute (Centennial College, Toronto, Canada) |
| CEI➣Centre for Environmental Information (Russia) |
| CEI➣Cognition, Éducation, Interactions (French: Cognition, Education, Interaction; Université de Nantes; Nantes, France) |
| CEI➣Collège d'Etudes Internationales (French: College of International Studies; Université Paris-Sud; Orsay, France) |
| CEI➣Chemistry Education International |
| CEI➣Chauffage Électrique Intégré (French: Integrated Electric Heating) |
| CEI➣California Electrical Inspectors |
| CEI➣Commodity Exchange, Inc. |
| CEI➣Committee on Environmental Issues |
| CEI➣Contrôle de l'Environnement Industriel (French: Control of Industrial Environment; professional certification) |
| CEI➣Connected Element Interferometry |
| CEI➣Competitive Edge, Inc. (Peachtree City, GA) |
| CEI➣Cablage Electronique Informatique (French: Computer Cables Electronics; Bondoufle, France) |
| CEI➣Capital Equipment Inventory |
| CEI➣Communications Electronics Intelligence |
| CEI➣Construction Equipment Institute |
| CEI➣COMINT/ELINT Integration |
| CEI➣Communications Electronics Instruction |
| CEI➣Comprehensive Emissions Inventory |
| CEI➣Commission Économique Interministérielle (French: Interministerial Economic Commission; Belgium) |
| CEI➣Canadian External Interface |
| CEI➣Communications Electronics Installation |
| CEI➣Configured End Item |
| CEI➣Critical Equipment Indicator |
| CEI➣Corporación Eléctrica Industrial (Spanish, Guatemala) |
| CEI➣Construction/Environmental Issues Committee (Oregon) |
| CEI➣Conseil des Étudiants de l'Institut (French: Student Council of the Institute; Institut de Chimie des Substances Naturelles; Gif-sur-Yvette, France) |
| CEI➣Collectieve Energie Inkoop (Dutch: Collective Purchasing Power) |
| CEI➣College Equality Index (cultural climate index) |