| Abbreviation | Definition |
|---|---|
| JAM | Japanese Association of Metal |
| JANC | Jamaica Association of Northern California |
| JASC | Japan America Student Conference |
| JASCI | Japan- America Student Conference, Inc. |
| JASNA | Jane Austen Society of North America |
| JASSG | Joanna de Angelis Spiritist Study Group |
| JASTB | Japan-America Society of Tampa Bay |
| JAT | Jamaah Ansharut Tauhid |
| JAYS | Jaycees Against Youth Smoking |
| JBA | Jacksonville Bar Association |
| JBA | Japan Boiler Association |
| JBCF | Johnny Burke Childrens Foundation |
| JBCH | Jane Boyd Community House |
| JBCP | John Banner Charitable Promotions |
| JBFC | Jacob Burns Film Center |
| JBFCS | Jewish Board of Family and Children's Services |
| JBI | Jewish Braille Institute of America |
| JCA | Jamaican Canadian Association |
| JCA | Jewish Colonisation Association |
| JCAHO | Joint Commission on Accreditation of Healthcare Organizations |