| CESI | Caribbean Energy Security Initiative 
| Others |
| CESI | Catalytica Energy Systems Incorporated
| Others |
| CESI | Center for Education Simulation and Innovation
| Others |
| CESI | Center for Education Simulation Innovation
| Others |
| CESI | Centro Elettrotecnico Sperimentale Italiano
| Others |
| CESI | Certification Exhaust System Inspector
| Others |
| CESI | Certified Exhaust System Inspector
| Others |
| CESI | Cesicentre For Economic And Social Inclusion
| Others |
| CESI | Chauffe Eau Solaire Individuel
| Others |
| CESI | China Electronics Standardization Institute
| Others |
| CESI | Civic Engagement Scholars Initiative
| Others |
| CESI | Coal Export Services International
| Others |
| CESI | Cole Engineering Services Inc
| Others |
| CESI | Common Enterprise Streaming Infrastructure
| Others |
| CESI | Communications And Electrical Supplies Inc
| Others |
| CESI | Computerized Enrollment System for Instructors
| Others |
| CESI | Computers in Education Society of Ireland
| Others |
| CESI | Confidential Expression Of Settlement Interest
| Others |
| CESI | Consumer Electronics Servicing and Installations
| Others |
| CESI | Council For Elementary Science International
| Others |
| CESI | Cultural Exchange and Support Initiative
| Others |