CSEI
| Acronym | Definition |
|---|---|
| CSEI | Coopersmith Self-Esteem Inventory |
| CSEI | China Special Equipment Inspection (and Research Center) |
| CSEI | Centre Synergie Entreprise Industrielle (French: Synergy Enterprise Industrial Center) |
| CSEI | Center for the Study of Emerging Infections (Saint Louis University School of Public Health; St. Louis, MO) |
| CSEI | Connection Strategies Enterprises, Inc. (Milwaukee, WI) |
| CSEI | Canadian Superior Energy, Inc. |
| CSEI | Corvettes of Southeast Idaho (Idaho Falls, ID) |