| Abbreviation | Definition |
|---|---|
| ACIC | Automated Combat Intelligence Center |
| ACID | Adaptive COMSEC Interface Device |
| ACID | Analysis Console For Intrusion Databases |
| ACIF | Automated Central Issue Facility System |
| ACIIP(S) | Automated Clothing Initial Issue Point (System) |
| ACIIPS | Automated Clothing Initial Issue Point System |
| ACIMD | Advanced Common Intercept Missile Demonstration |
| ACIND | Air Combat Intelligence Needs |
| ACINT | Acoustic Intelligence |
| ACIP | Automated COSAL Improvement Program |
| ACIP | Aviation Career Information Program |
| ACIRC | African Capacity for Immediate Response to Crises |
| ACIS | Army Combat Identification System |
| ACIS | Army Command Information System |
| ACIS | Automated Combat Information System |
| ACISD | Advanced Computational and Information Sciences Directorate |
| ACISS | Army Communication and Information Systems Specialist |
| ACK | ACKnowledgement |
| ACL | Access Control Level |
| ACL | Aircraft Cabin Load |