| Abbreviation | Definition |
|---|---|
| ACT | Assurance Collection Tool |
| ACT | Automatic Contact Tracking |
| ACTIVE | Achieving Competitiveness Through Innovation and Value Enhancement |
| ACTIVE | All Companies Together In Various Exercises |
| actn | Action |
| ACTS | A Commitment To Service |
| ACTS | Advanced Creative Total Service |
| ACTS | Alberta Construction Tendering System |
| ACTT | Accelerated Construction Technology Transfer |
| ACV | All Commodity Volume |
| ACW | After Call Work |
| ACW | Approval to Commence Work |
| ACWG | Administrative Cooperation Working Group |
| ACWP | Actual Cost of Work Performed |
| AD | Accumulation Distribution |
| AD | Additional Delivery |
| AD | Advertisement |
| AD | Aggregate Demand |
| AD | Auto Date |
| ADAC | Allgemeine Deutscher Automobil-Club (General German Automobile Association) |