| Acronym | Meaning |
| CTAC | Cable TV Advisory Committee (Massachusetts) |
| CTAC | Carlsbad Field Office Technical Assistance Contractor |
| CTAC | Center for Army Tactics |
| CTAC | Centre Territorial d'Administration et de Comptabilité (French: Territorial Administration and Accounting Center) |
| CTAC | Consolidated Test And Certification (US Navy) |
| CTAC | Corps Tactical Command Post |
| CTAC | Counter-Drug Technology Assessment Center |
| CTAC | Cryptologic Technician (Administrative) Chief (US Navy) |