| Acronym | Definition |
|---|
| ACTT | Actors College of Theatre and Television (Australia) |
| ACTT | Aircraft Total Time (aviation) |
| ACTT | Assertive Community Treatment Teams |
| ACTT | Association of Cinematograph, Television and Allied Technicians (UK) |
| ACTT | Accreditation Council of Trinidad and Tobago (Port-of-Spain, Trinidad, WI) |
| ACTT | Arkansas Cycle Touring and Training |
| ACTT | Association of Classroom Teacher Testers (Montecito, CA) |
| ACTT | Advanced Communications Timekeeping Technology |
| ACTT | Advanced Centers for Technology and Training |
| ACTT | ASEAN Communication Team for Tourism |
| ACTT | Affordable Computers and Technology for Tanzania (Moshi, Tanzania) |
| ACTT | Air and Command Tactical Trainers |
| ACTT | Association of Cinematography and Television Technicians |