| Abbreviation | Definition |
|---|---|
| ACTP | Association des Clients des Transports Publics |
| ACTP | Austrian Construction Technology Platform |
| ACTP | Automated Control Technology Partners |
| ACTR | American Coalition for Taxpayer Rights |
| ACTS | A Community That Serves |
| ACTS | Accepting Connecting Training Serving |
| ACTS | Actions for Christ Through Service |
| ACTS | Active Catholic Teens in Service |
| ACTS | Active Compassionate Transformational Service |
| ACTS | Actively Caring Through Sharing |
| ACTS | Adoration Confession Thanksgiving Supplication |
| ACTS | Adoration Contrition Thanksgiving Supplication |
| ACTS | Agency For Community Treatment Services |
| ACTS | All Care To Share |
| ACTS | Americans Caring Teaching Sharing |
| ACTS | Antioch Center for Training and Sending |
| ACTS | Arkansas Course Transfer System |
| ACTT | Achieving Change Through Torah |
| ACTT | Action for Children Today and Tomorrow |
| ACTT | Advanced Corrosion Technologies and Training |