| Abbreviation | Definition |
|---|---|
| J | Java |
| J# | J-sharp programming language |
| JACK | Just Another Concurrency Kit |
| JADE | Jade Allows Data Exchange |
| JADE | Just Another Draft Editor |
| JAF | Javabean Activation Framework |
| JAGI | Journal of Artificial General Intelligence |
| JAID | Journal And Information Databases |
| JAID-WOG | Journal And Information Databases - Working Group |
| JAIL | Jestly Artificial Intelligent Language |
| JAL | Just Another Language |
| JAM | Java Application Manager |
| JAM | Joe's Abstract Machine |
| JANUS | Joint Analytical Network For Using Socio |
| JAR | Journal of Automated Reasoning |
| JAS | Java Application Server |
| JAWS | Jobs Applications With Speech |
| JAXB | Java Architecture For Xml Binding |
| JBD | Jabber Bookmark Directory |
| JBD | Journaling Block Device |