| Acronym | Definition |
|---|
| ACTA | Anti-Counterfeiting Trade Agreement |
| ACTA | Acetic Acid |
| ACTA | American Council of Trustees and Alumni |
| ACTA | Academisch Centrum Tandheelkunde Amsterdam (Amsterdam Academic Centre for Dentistry, Holland) |
| ACTA | Association de Coordination Technique Agricole (France) |
| ACTA | Administrative Council for Terminal Attachments |
| ACTA | Alameda Corridor Transportation Authority (California) |
| ACTA | Association of Canadian Travel Agents |
| ACTA | America's Carriers Telecommunications Association |
| ACTA | Alameda County Transportation Authority |
| ACTA | Allensbacher Computer- und Telekommunikations-Analyse (German: computer and telecommunications analysis of Allensbach) |
| ACTA | Alliance of Canadian Travel Associations |
| ACTA | Air Traffic Control Association |
| ACTA | Association of Cardiothoracic Anaesthetists (United Kingdom) |
| ACTA | Advanced Combat Training Academy |
| ACTA | Australian Chemical Trauma Alliance, Inc. |
| ACTA | American Chungdokwan Taekwondo Association |
| ACTA | Australian Telescope Compact Array |
| ACTA | American Community Theatre Association (now American Association of Community Theatre) |
| ACTA | Arkansas Cable Telecommunications Association |
| ACTA | Australia Clay Target Association |
| ACTA | Arlington County Tennis Association (Virginia) |
| ACTA | Anglo-Catholic Church in the Americas |
| ACTA | Alameda Corridor Transportation Agency |
| ACTA | Alabama Cable Telecommunications Association |
| ACTA | Against Cruelty to Animals |
| ACTA | Acces Creativity Theatre Arts (Bristol England community theatre) |