| ACTM | A Call To Men 
| Others |
| ACTM | Accelerated Corrosion Testing Method
| Others |
| ACTM | Alabama Council of Teachers of Mathematics
| Others |
| ACTM | Alaska Council of Teachers of Mathematics
| Others |
| ACTM | Alberta Cell Therapy Manufacturing
| Others |
| ACTM | Animal Crossing: The Movie
| Others |
| ACTM | Arkansas Council of Teachers of Mathematics
| Others |
| ACTM | Association for Communications Technology Management
| Others |
| ACTM | Association of Certified Treasury Managers
| Others |
| ACTM | Atlantic College of Therapeutic Massage
| Others |
| ACTM | Atmospheric Chemical Transport Model
| Others |
| ACTM | Aufdenkamp Connection Transmission Main
| Others |
| ACTM | Australasian College of Tropical Medicine
| Others |
| ACTM | Australasian Contact Tracing Manual
| Others |