| Acronym | Definition |
|---|
| JAC | Journal of Antimicrobial Chemotherapy |
| JAC | Jackson Hole Airport (Jackson, WY) |
| JAC | Joint Astronomy Centre |
| JAC | Japan Air Commuter (airline) |
| JAC | Joint Apprenticeship Committee (various organizations) |
| JAC | Juvenile Assessment Center |
| JAC | Journal of Accountancy (American Institute of Certified Public Accountants) |
| JAC | Japanese Association of Chiropractors (Tokyo, Japan) |
| JAC | Joint Advisory Committee (Board of Directors for SEI) |
| JAC | Japanese Alpine Club (est. 1905) |
| JAC | Joint Analysis Center |
| JAC | Joint Apprenticeship Council (unions; Canada) |
| JAC | Judicial Appointments Commission (UK) |
| JAC | Jewish Arab Center (Israel) |
| JAC | John Abbott College |
| JAC | Jepson Alumni Center (Virginia) |
| JAC | Journal of Architectural Coatings |
| JAC | Journal of Atmospheric Chemistry |
| JAC | Jackson Hole, WY, USA - Jackson Hole Airport (Airport Code) |
| JAC | Justice Administration Commission (Florida) |
| JAC | Journal of Ancient Civilizations |
| JAC | Japan Agricultural Cooperative |
| JAC | Journées Automates Cellulaires (Symposium on Cellular Automata) |
| JAC | Japan Alliance Church |
| JAC | Jews Against Circumcision |
| JAC | Java Access Control |
| JAC | Jordan Aeronautical-Systems Company |
| JAC | Junior Apostolates for Christ (San Francisco area) |
| JAC | Juventud Acción Católica (Catholic youth organization) |
| JAC | Jobs And Courses |
| JAC | Juvenile Advisory Committee |
| JAC | Juba Air Cargo (Sudan) |
| JAC | Japanese Association of Colorado |
| JAC | Just About Caring (school club) |
| JAC | Joint Airspace Control |
| JAC | Japan Aircraft Company |
| JAC | Joint Interoperability of Tactical Command & Control Systems Automatic Committee |
| JAC | Junior Advancement Coordinator (Boy Scouts of America) |
| JAC | JA Consultants (UK) |
| JAC | Juveniles Against Crime (Calvin Drake program) |
| JAC | Junior Achievement Conference |
| JAC | Joint Labor-Management Apprenticeship Committee |