| Abbreviation | Definition |
|---|---|
| CIRP | Colombo Institute of Research Psychology |
| CIRR | Canadian Institute of Reading Recovery |
| CIRR | Canadian Institute of Reading Recovery Canadian Institute of |
| CIRS | Cultural Institutions Retirement System |
| CIRT | Central Institute of Road Transport |
| CIS | Cardiovascular Institute of the South |
| CISA | Canadian Institute for the Study of Antisemitism |
| CISC | Clemson Institute for the Study of Capitalism |
| CISC | CUNY Institute |
| CISC | CUNY Institute for Sustainable Cities |
| CISCA | Collective Investment Schemes Control Act |
| CISD | Correctional Institution Standardized Development |
| CISF | Central Institute of Security Force |
| CISHE | Cardiff Institute for Society Health and Ethics |
| CISHE | Cardiff Institute of Society Health Ethics |
| CISI | California Institute for School Improvement |
| CISI | Chartered Institute for Securities & Investment |
| CISI | Chartered Institute for Securities and Investments |
| CISI | Chartered Institute of Securities and Investment |
| CISI | Cultural Identity Studies Institute |