JACK
| Acronym | Definition |
|---|---|
| JACK | Jack Audio Connection Kit |
| JACK | Joint Action Council Kannur (India) |
| JACK | Java Applet Correctness Kit (computer programming) |
| JACK | Joint Advisory Commission Korea (US covert operation; Korean War) |
| JACK | Just Another Contract Killer (game) |
| JACK | Java Application Component Kit |