| Abbreviation | Definition |
|---|---|
| CSRI | Credit Suisse Research Institute |
| CSRI | Cyber Security Research Institute |
| CSSI | Carleton Summer Science Institute |
| CSSI | Computational Social Science Institute |
| CSSI | Computer Science Summer Institute |
| CSSRI | Central Soil Salinity Research Institute |
| CSTI | California Specialized Training Institute |
| CSTI | California Specialized Training Institute California Specialized |
| CSTI | Command and Staff Training Institute |
| CSWCRTI | Central Soil and Water Conservation Research and Training Institute |
| CSWCRTI | Central Soil Water Conservation Research and Training Institute |
| CSWCRTI | Central Soil Water Conservation Research Training Institute |
| CTCRI | Central Tobacco Crop Research Institute |
| CTCRI | Central Tuber Crops Research Institute |
| CTEI | Comprehensive Teacher Education Institute |
| CTI | Coaches Training Institute |
| CTI | Coaches Training Institute?? |
| CTI | Commercial Theater Institute |
| CTIM | Community Technological Institute of Miami |
| CTLI | Cape Teaching and Leadership Institute |