| Abbreviation | Definition |
|---|---|
| JABBA | John Adams Bucket Band of Awesomeness |
| JALC | Jazz at Lincoln Center |
| JAM | Jacksonville Area Musicians |
| JAM | Jazz Appreciation Month |
| JAM | Jersey Acoustic Music |
| JAM | Junior Amateur Musicians |
| JAMM | Juneau Alaska Music Matters |
| JAMPAC | Joint Artists And Music Promoters Action Committee |
| JAMS | Jamaica Arts Music Summer |
| JamSession | An ad-hoc meeting where whoever shows up joins the group to play music. |
| JAS | Jazz Aspen Snowmass |
| JASA | Journal of the Acoustical Society of America |
| JATB | Jazz At The Bistro |
| JATP | Jazz At The Philharmonic |
| JB | Jazz bass |
| JB | Jazz Blues |
| JB | Jazz Bridge |
| JB | Jazzy Blues |
| JB | Jonas Brothers |
| JBC | Jazz and Blues Classics |