| Abbreviation | Definition |
|---|---|
| CY | Canada Youth (under the auspices of the Presbyterian Church in Canada) |
| CYBG | Caught You Being Good |
| CYBVIS | Workshop on CYBernetic VISion |
| CYC | Challenge Youth Conference |
| CYCC | Celebrate the Young Child Conference |
| CYLC | Chicano Youth Leadership Conference |
| CZI | Confederation of |
| CZI | Confederation of Zimbabwe Industries |
| CZI | Confederation of Zimbabwe Industry |
| DAAC | Dell Annual Analyst Conference |
| DAAC | Dell's Annual Analyst Conference |
| DAC | Dakota Athletic Conference |
| DAC | Design Automation Conference |
| DACC | Domestic Abuse Conference Call |
| DAEC | Diocesan Adult Enrichment Conference |
| DANCE | Darpa Active Networks Conference and Exposition |
| DASC | Digital Avionics Systems Conference |
| DASC | IEEE/AIAA Digital Avionics System Conference |
| DATCOM | DATa COMmunications Symposium |
| DAYTON | IEEE/AESS Dayton Chapter Symposium Avionics Integrity Program |