| Acronym | Definition |
|---|
| CTIA | Cellular Telecommunications Industry Association |
| CTIA | Cellular Telecommunications and Internet Association |
| CTIA | Capacitive Trans-Impedance Amplifier |
| CTIA | Common Training Instrumentation Architecture |
| CTIA | Clark-Theders Insurance Agency (Ohio) |
| CTIA | Color Television Interface Adapter (Atari 8-bit computer custom chip) |
| CTIA | Computer Technology Industry Association |
| CTIA | Committee to Investigate Assassinations |
| CTIA | Certificate in Teaching Italian to Adults |
| CTIA | Cie de Théâtre l'Impromptu de l'Assomption (French; l'Assomption, Québec) |