| Abbreviation | Definition |
|---|---|
| ACTIV | Association of Cardiac Technology In Victoria |
| ACTL | Aiken County Technology Laboratory |
| ACTM | Association for Communications Technology Management |
| ACTMESS | Always Connected Technologies Mobile Emergency Support Systems |
| ACTP | Austrian Construction Technology Platform |
| ACTP | Automated Control Technology Partners |
| ACTT | Advanced Certifications and Training for Technology |
| ACTU | Access to Communication Technology Unit |
| ADACT | Associate Degree in Artchitecture Construction Technology |
| ADAPT | Associate Development And Performance Tracker |
| ADAT | Abu Dhabi Aircraft Technologies |
| ADAT | Air Defense Advanced Technology |
| ADD | Attrribute-Driven Design |
| ADET | Advanced Drivetrain Engineering Technology |
| ADLT | Advanced Discriminating LADAR Technology |
| ADMC | Aerospace and Defense Manufacturing Center |
| ADPT | Advanced Design and Production Technology |
| ADs | Architectural decisions |
| ADST | Assay Development and Screening Technology |
| ADT | Advanced Design Technology |