| Abbreviation | Definition |
|---|---|
| JC | Jump if Carry |
| JC | The Jang Chin method |
| JCA | Juvenile Chronic Arthritis |
| JCB | J. C. Bamford Excavators, LTD. |
| JCB | Journal of Creative Behavior |
| JCC | Junior Chamber of Commerce |
| JCC | Joint Central Committee |
| JCCS | Junior Certificate Course in Statistics |
| JCF | Jamaica Constabulary Force |
| JCHC | Joint Commission on Hospital Accreditation |
| JCJ | Joint Controlled Joints |
| JCK | Joint Commission on Korea |
| JCL | Job Control Language |
| JCM | Joint Consultative Machinery |
| JCM | Jaguar Connection Manager |
| JCMT | James Clerk Maxwell Telescope |
| JCO | Junior Commissioned Officer |
| JCO | Journal of Clinical Oncology |
| JCP | Job Content Questionnaire |
| JCP | Java Certified Programmer |
| JCP | Joint Power Conditions |
| JCP | Juvenile Chronic Polyarthritis |
| JCR | Jam Card Reader |
| JCS | Job Connection Services |
| JCSD | Jefferson County Sheriff's Department |
| JCSK | Job Cut Survival Kit |
| JCSO | Johnston County Sheriff Office |
| JCSSAB | Joint Committee of the States to Study Alcohol Beverage laws |
| JCSW | Joint Counts for SWelling |
| JCW | Journalism and Creative Writing |
| JCXZ | Jump if CX Register Zero |
| JD | Janta Dal |
| JD (S) | Janata Dal (Secular) |
| JD (U) | Janata Dal (United) |
| JDAC | JJIS District Area Contact |
| JDD | Juvenile Discogenic Disease |
| JDF | Job Definition Format |
| JDH | Juvenile Detention Hall/Juvenile Justice Complex |
| JDMS | Juvenile Dermatomyositis |
| JDQ | Job Description Questionnaire |
| JDQ | Job Documentation Questionnaire |
| JDU | Janta Dal United |
| JDX | Joint Damping Experiment |
| JE | Jump If Equal |
| JE | Junior Engineer |
| JEA | Joint Endeavor Agreement |
| JECXZ | Jump if ECX Register Zero |
| JED | Julian Ephemeris Data |
| JEI | Jewish Environmental Initiative |
| JEITA | Japan Electronics And Information Technology Industries Association |