| JAC | A Charlier 
| Others |
| JAC | Jackson Arthritis Center
| Others |
| JAC | Jackson Hole, Wyoming USA
| Others |
| JAC | Jacksonville Jaguars
| Others |
| JAC | Jamming Assisted Crime
| Others |
| JAC | Janet Amelia Challice
| Others |
| JAC | Japanese Animation Club
| Others |
| JAC | Japanese Appreciation Club
| Others |
| JAC | Japanese Army Cypher
| Others |
| JAC | Japanese Auto Care
| Others |
| JAC | Japanese Auto Center
| Others |
| JAC | Japanese Auto City
| Others |
| JAC | Java Aspect Components
| Others |
| JAC | Jeep Adventure Club
| Others |
| JAC | Jefferson Area Community
| Others |
| JAC | Jens Automobile Company
| Others |
| JAC | Jewish Activities Center
| Others |
| JAC | Jewish Anti-fascist Committee
| Others |
| JAC | Jewish Arizonans on Campus
| Others |
| JAC | JFET Audio Compression
| Others |
| JAC | Jianghuai Automobile Company
| Others |
| JAC | Jianghuai Automobile Corporation
| Others |
| JAC | Jogja Agya Community
| Others |
| JAC | Joint Advisory Committee
| Others |
| JAC | Joint AMBER CHARMM
| Others |
| JAC | Joint Analysis Center
| Others |
| JAC | Joint Apprentice Committee
| Others |
| JAC | Joint Apprenticeship Committee
| Others |
| JAC | Joint Apprenticeship Council
| Others |
| JAC | Joint Appropriations Committee
| Others |
| JAC | Joint Audit Committee
| Others |
| JAC | Joint Audit Cooperation
| Others |
| JAC | Jordan Aeronautical-Systems Company
| Others |
| JAC | Journal of Antimicrobial Chemotherapy
| Others |
| JAC | Journal of Applied Crystallography
| Others |
| JAC | Jump Around Carson
| Others |
| JAC | Junior Ale Can
| Others |
| JAC | Junior Auxiliary Committee
| Others |
| JAC | Just A Cat
| Others |
| JAC | Just A Civilian
| Others |
| JAC | Just Add Cattle
| Others |
| JAC | Just Another Christian
| Others |
| JAC | Just Awesome Communication
| Others |
| JAC | Justice Administrative Commission
| Others |
| JAC | Justice and Accountability Center
| Others |
| JAC | Juvenile Advisory Committee
| Others |
| JAC | Juvenile Assessment Center
| Others |
| JAC | Juveniles Against Crime Program
| Others |