| Abbreviation | Definition |
|---|---|
| DCDI | Diocesan Church Development Institute |
| DCI | Career Institute |
| DCI | Digital Creative Institute |
| DCI | Dutch Certification Institute |
| DCIV | Danube Cultural Institute in Vienna |
| DCIV | Danube Cultural Institute Vienna |
| DCRI | Duke Clinical Research Institute |
| DCSI | Drilling and Coring Summer Institute |
| DCTI | Danforth Collegiate and Technical Institute |
| DCTI | Diliman Computer Technology Institute |
| DDCI | Delbert Day Cancer Institute |
| DDGI | Dayanand Dinanath Group of Institutions |
| DDI | Deep Democracy Institute |
| DDI | Demand Driven Institute |
| DDMI | David Davies Memorial Institute |
| DDPI | Dyadic Developmental Psychotherapy Institute |
| DDSI | Digestive Disease Surgery Institute |
| DEDI | Danish Egyptian Dialogue Institute |
| DERI | Defence Evaluation and Research Institute |
| DERI | Digital Enterprise Research Institute |