ACTM
| Acronym | Definition |
|---|---|
| ACTM | Atmospheric Chemistry Transport Model |
| ACTM | Arkansas Council of Teachers of Mathematics |
| ACTM | Auto, Commercial, Trailer, Motorcycle (California Department of Motor Vehicles) |
| ACTM | Association of Certified Treasury Managers (est. 1998; India) |
| ACTM | Atlantic College of Therapeutic Massage (Fredericton, NB, Canada) |
| ACTM | Australian College of Tropical Medicine |
| ACTM | Aircraft Collection Tasking Message |