| Abbreviation | Definition |
|---|---|
| CBCU | Covered Bridge Credit Union |
| CBIU | Catholic Biblical Instructors Union |
| CBIU | Catholic biblical instructor's union |
| CBTU | Canadian Building Trades Unions |
| CBUC | Central Brazil Union Conference |
| CBUS | Construction and Building Unions Superannuation |
| CCAWDU | Coalition of Cambodian Apparel Workers Democratic Union |
| CCAWDU | Coalition of Cambodian Apparel Workers Democratic Unions |
| CCCU | Caribbean Confederation of Credit Unions |
| CCCU | Cascade Central Credit Union |
| CCCU | Centex Citizens Credit Union |
| CCCU | Central Communications Credit Union |
| CCCU | Chippewa County Credit Union |
| CCCU | Cincinnati Central Credit Union |
| CCCU | City Center Credit Union |
| CCCU | City County Credit Union |
| CCCU | Clark County Credit Union |
| CCCU | Coast Central Credit Union |
| CCCU | Community Choice Credit Union |
| CCDU | Claremont Colleges Debate Union |