| Abbreviation | Definition |
|---|---|
| CLTC | Chapter Leadership Training Conference |
| CMAC | Central Michigan Athletic Conference |
| CMAC | Chiang Mai Athletics Conference |
| CMAC | Cincinnati Metro Athletic Conference |
| CMBBE | Computer Methods in Biomechanics and Biomedical Engineering (conference) |
| CMBC | Central Maine Basketball Conference |
| CMC | Concept Mapping Conference |
| CMC | Conservative Mennonite Conference |
| CMCCC | Canadian Man Computer Communications Conference |
| CMID | Construction Material Indoor Decoration Exhibition |
| CMID | Construction Material & Indoor Decoration Exhibition |
| CMMC | Conference Multiplexing and Management Centre |
| CMMO | Conference on Modeling of Machining Operations |
| CMPARC | International Symposium on CoMPuter ARChitecture |
| CMPEUR | International Conference on CoMPuter technology systems and applications in EURope |
| CMPSAC | International CoMPuter Software and Applications Conference |
| CMS | Conference Management System |
| CMSC | Coordinate Metrology Society Conference |
| CMSC | Coordinate Metrology Systems Conference |
| CMSF | Conference of Major Super Funds |