| Abbreviation | Definition |
|---|---|
| COF | Cradle Of Filth |
| COHH | C O H H Camp of Hip Hop |
| COHH | Camp of Hip Hop |
| COHH | Chronicles of Hip Hop |
| COHH | Curators of Hip Hop |
| COLT | Code Orchestra Livecoding Tool |
| COMBO | Collective Of Musicians Belfast Organisation |
| COMEA | Central Oregon Music Education Association |
| COMEA | Council Of Music Education Associations |
| COMNAC | College Of Music National Alumni Council |
| COMPAS | Center Of Music and Performing Arts Southwest |
| COMPAS | Conservatory of Music and Performing Arts Society |
| COOL | Chamber Orchestra Of London |
| COOM | Connecting Oriental Occidental Musicians |
| COR | Catalogue Of Riffs |
| COS | Company Of Song |
| COTC | Children Of The Cemetery |
| COTE | Center of the Earth |
| COTF | Children Of The Fallen |
| COTF | Cleaning Out the Fridge |