| Abbreviation | Definition |
|---|---|
| CJO | Columbus Jazz Orchestra |
| CJO | Contemporary Jazz Orchestra |
| CJP | Chicago Jazz Philharmonic |
| CJR | Cadence Jazz Records |
| CJW | Cigar Jazz Wine |
| CJW | Cigars Jazz and Wine |
| CJX12S | Country Jumbo Acoustic electric guitar, Solid spruce top |
| CK | Convent Kajang |
| CKB | Cracow Klezmer Band (Poland) |
| CKFB | Captain Kirks Favourite Band |
| CKMB | Creatine Kinase Myocardial Band |
| CKMHOY | Can't Keep My Hands Off You |
| CKVB | Clausing Kalamazoo Vertical Bandsaws |
| CL | C Lower |
| CL | Cello |
| CLCB | Cranbourne Lions Concert Band |
| CLCFFB | Colonel Les Claypool's Flying Frog Brigade |
| CLHR | Coldharbour Recordings |
| CLMS | Computer Lab For Music And Sound |
| CLPGS | City of London Phonograph and Gramophone Society |