| Abbreviation | Definition |
|---|---|
| CMM | Corpus Mensurabilis Musicae |
| CMN | Children's Music Network |
| CMN | Common Music Notation |
| CMNB | Country Music News Blog |
| CMNC | Chamber Musicians of Northern California |
| CMNI | Carnatic Music Note Identification |
| CMNI | Country Music News International |
| CMOTA | Choral Music of the Americas |
| CMP | Chamber Music Players |
| CMPA | Canadian Music Publishers Association |
| CMPA | Centre for Music and Performing Arts |
| CMPA | Church Music Publishers Association |
| CMPA | College of Music and Performing Arts |
| CMQ | Church Music Quarterly |
| CMR | Castle Music Records |
| CMRC | Contemporary Music Research Centre |
| CMRH | Christian Music Review Headquarters |
| CMRRA | Canadian Musical Reproduction Rights Agency |
| CMS | Chamber Music Society |
| CMS | College Music Society |