| Abbreviation | Definition |
|---|---|
| ACIP | Airport Capital Improvement Plan |
| ACIS | Automated Customs Information Service |
| ACIT | Administrative Committee for Information Technology |
| ACLU | Atheists, Communists, And Liberals United |
| ACM | Advanced Campaign Mode |
| ACMG | Anti Corruption Monitoring Group |
| ACMT | Approved Contract Manufacturers and Traders |
| ACO | Administrative contracting office |
| ACP | Advance Care Planning |
| ACPI | Advanced Configuration and Power Interface |
| ACPS | Automated Contract Preparation System |
| ACQWEB | Office of the Under Secretary of Defense for Acquisition and Technology |
| ACR | African Crisis Response |
| ACRC | American Council on Regulatory Compliance |
| ACRI | African Crisis Response Initiative |
| ACRN | Accounting Classification Reference Number |
| ACRONYM | Accountability and Congressional Responsibility On Naming Your Motions |
| ACRP | Archive of Census Related Products |
| ACS | Agency Classification Standard |
| ACSES | Automated Child Support Enforcement System |