| Abbreviation | Definition |
|---|---|
| JJI | Juvenile Justice Initiative |
| JJP | Jury Justice Project |
| JLCC | John Lilley Correctional Center |
| JLF | Jenkins Law Firm, PLLC |
| JLR | Jersey Law Reports |
| JM | Japanese Man |
| JM | Just Missing |
| JMC | Jokers Mech Clan |
| J-NET | Juvenile Network System |
| JOLT | Harvard Journal of Law and Technology |
| JP | Jurys Perfection |
| JP | Justice And Peace |
| JPA | Small Business Job Protection Act of 1996 |
| JPIP | Judicial Performance Improvement Project |
| JPL | Japan Patent Law |
| JPU | Justice Programs Unit |
| JR | Jane Roe |
| JR | Just Relentless |
| JRS | Judges and Judicial Retirement System |
| JSA | Justice Society of America |