| Abbreviation | Definition |
|---|---|
| JAPC | Japan Atomic Power Company |
| JARC | Johnstown American Railcar Company |
| JAS | John A. Shirley Consulting |
| JASC | Japanese Automotive Service Corp |
| JASC | Jets And Airplanes Software Company |
| JASC | Julie Allstat Software Company |
| JASC | Just Another Software Company |
| JASCO | Jabuloni Arwai Cooperation |
| JASL | Jardine Airport Services Ltd |
| JASSI | Japanese American Social Services Inc |
| JAW | James and Anas's Workshop |
| JAWS | Just Add Water Studio |
| JB | Jackson Bishop |
| JB | Jacques Blancpain |
| JB | Joint Business |
| JBC | Jamaica Broadcasting Corporation |
| JBC | Jamaican Beer Conglomerate |
| JBC | JohnBarberComics.com |
| JBCC | Japan Business Computer Company, LTD. |
| JBCC | Jelly Belly Candy Company |