| Abbreviation | Definition |
|---|---|
| JMAD | Journalism Media and Democracy |
| JMST | Joint Mediation Support Team |
| JNN | Jaguar News Network |
| JNN | Jamaica News Network |
| JNN | Japan News Network |
| JNN | Jenifer News Network |
| JNN | Jerusalem News Network |
| JNRR | Joint National Readership Research |
| JNS | Jewish News Syndicate |
| JRTC | Jordan Radio and Television Corporation |
| JSN | Jersey Sporting News |
| JUX | Juxtapose |
| JVC | Victor Company of Japan |
| KAOBS | Kendal Avenue Outside Broadcasts |
| KARMA | Knowledge Acquisition Reference Multimedia Aid |
| KBB | Kelly Blue Book |
| KC | Kismat Connection |
| KCMG | Kirktonhall Creative Media Group |
| KCN | Koles Coin News |
| KCP | Kids Can Press |