| Acronym | Sense | Language | Topics |
|---|---|---|---|
| ACT | Adaptive Control of Thought | In English | → Psychology → Neurology |
| ACT | Assisted Conception Taskforce | In English | |
| ACT | Acquisition Coarse Tracker | In English | |
| ACT | Acquisition, Control & Test | In English | |
| ACT | Audio Center Transmission | In English | → Telecommunications |
| ACT | American College of Theriogenologists | In English | → Organizations and associations → United States |
| ACT | Anti-Clogging Token | In English | → Software |