| Abbreviation | Definition |
|---|---|
| JUDO | Justice Under Determination Opportunity |
| JUI | Judging Under the Influence |
| JUJ | Jews United for Justice |
| JUMP | Juvenile Urban Mentoring Program |
| JUR | Jurisprudence |
| JUS | Justice |
| JUTA | Justice Unity Truth Always |
| JUU | Judgment Under Uncertainty |
| JVI | Justice Ventures International |
| JVQ | Juvenile Victimization Questionnaire |
| JVU | Justice Victims United |
| JWI | Justice Web Interface |
| JWJ | Jobs with Justice |
| JWOD | Javits- Wagner- O'Day |
| JWR | Jodie Wilson-Raybould |
| JY | Judicial Yuan |
| JYS | Juneau Youth Services, Inc. |
| JYS | Justify Your Silence |
| K | Kidnapping |
| K | Killer |