| Abbreviation | Definition |
|---|---|
| ACT | Autism Care and Treatment |
| ACTA | A Call to Action |
| ACTA | Academisch Centrum Tandheelkunde Amsterdam |
| ACTA | Anon Coward Takes Acid |
| ACTA | Anti Counterfeit Trade Agreement |
| ACTA | Anti Counterfeiting Trade Agreement |
| ACTA | Automatic Computerized Transverse Axial |
| ACTC | A Conscientious Translation Company |
| ACTC | Advances in Circulating Tumor Cells |
| ACTC | Advances in Circulating Tumour Cells |
| ACTC | Alameda County Transportation Commission |
| ACTC | Almaden Cycle Touring Club |
| ACTC | American College of Tax Counsel |
| ACTC | Association for Core Texts and Courses |
| ACTD | Afghanistan Center for Training and Development |
| ACTD | ASEAN Common Technical Document |
| ACTD | ASEAN Common Technical Documents |
| ACTD | Asean Common Technical Dossier |
| ACTE | Adaptive Compliant Trailing Edge |
| ACTF | Advanced Cyberinfrastructure Teaching Facility |