| Abbreviation | Definition |
|---|---|
| JLS | Jack the Lad Swing (boyband) |
| JLS | Jodio Loco Sucio |
| JM | Jazz Master |
| JM | John Mayer |
| JMAS | Junior Music And Access Studies |
| JMC | Junior Music Camp |
| JMI | Jewish Music Institute |
| JMOMS | Joe Moses One-Man Showses |
| JMP | Jazz Mandolin Project |
| JMR | Jewish Music Report |
| JMT | Journal of Music Theory |
| JMT | Journal of Music Therapy |
| JMTC | Junior Musical Theatre Company |
| JMW | Japan Music Week |
| JNB | Jazz and Bass |
| JOJ | Jakarta Open Jazz |
| JOM | Jumbo Orchestra Model |
| JOSA | Jazz on a Sunday afternoon |
| JOSKIDCHIZCHEESE | Joskid Chizcheese is a person that is Inventive, Intelligent, Devoted to whatever he or she does, Musicial, Social, God fearing and an entity that device means to make the impossibles possible. |
| JP | Jazz and Precision |