| Abbreviation | Definition |
|---|---|
| JBPO | Joint Blood Program Office |
| JBT | Journal of Battlefield Technology |
| JC | Joint Council |
| JC | Justification Code |
| JC2 | Joint Command and Control |
| JC2SP | Joint Command and Control Support Programme |
| JC2WC | Joint Command and Control Warfare Center |
| JCA | Jamming Control Authority |
| JCA | Joint Capability Area |
| JCA | Joint Communication Activity |
| JCA | Joint Communications Authority |
| JCALS | Joint Computer-Aided Acquisition and Logistics System |
| JCASREP | Joint Casualty Report |
| JCAT | Joint Crisis Action Team |
| JCB | Joint Capabilities Board |
| JCB | Joint Communications Board |
| JCC | Joint Command Center |
| JCC | Joint Contracting Center |
| JCC | Joint Coordination Center |
| JCC | Joint Course Catalog |