| Abbreviation | Definition |
|---|---|
| CRBF | Cooper Rice Brading Foundation |
| CRDF | CEPT Research and Development Foundation |
| CRDF | CEPT Research Development Foundation |
| CRDF | Civilian Research and Development Foundation |
| CRF | Cave Research Foundation |
| CRF | Charitable Resource Foundation |
| CRF | Chicago Rowing Foundation |
| CRF | Choroideremia Research Foundation |
| CRF | Coral Restoration Foundation |
| CRF | Cystinosis Research Foundation |
| CRFC | Constitutional Rights Foundation Chicago |
| CRFC | Coral Restoration Foundation Curacao |
| CRFI | Cancer Research Foundation India |
| CRMF | Caring Response Madagascar Foundation |
| CRNF | Caribbean Returning Nationals Foundation |
| CRNF | Council for Responsible Nutrition Foundation |
| CRRF | Coral Reef Research Foundation |
| CRSF | Cal Ripken Sr Foundation |
| CSCF | Campbellford/ Seymour Community Foundation |
| CSCF | Campbellford/Seymour Community Foundation |