| JTAC | Jewish Teen Alliance of Chicago 
| Others |
| JTAC | John Tarleton Agricultural College
| Others |
| JTAC | Join Together Atlantic County
| Others |
| JTAC | Joint Tactical Air Controller
| Others |
| JTAC | Joint Technical Activities Committee
| Others |
| JTAC | Joint Technical Augmentation Cell
| Others |
| JTAC | Joint Terminal Attack Controller
| Military |
| JTAC | Joint Terminal Attack Controllers
| Others |
| JTAC | Joint Terrorism Analysis Center
| Others |
| JTAC | Joint Terrorism Analysis Centre
| Others |
| JTAC | Joint Training and Apprenticeship Committee
| Others |
| JTAC | Joint Training and Apprenticeship Committee J T A C
| Others |
| JTAC | Journal of Thermal Analysis and Calorimetry
| Others |
| JTAC | Juniper Networks Technical Assistance Center
| Others |
| JTAC | Juniper Technical Assistance Center
| Others |