| Abbreviation | Definition |
|---|---|
| ACPI | American Crime Prevention Institute |
| ACQ | ACQuired |
| ACRB | Administrative Case Review Board |
| ACRI | Alternative Case Resolution Initiative |
| ACS | Activity Control System |
| ACS | Always Cheating Somebody |
| ACSES | Advanced Civil Speed Enforcement System |
| ACSR | Association for Crime Scene Reconstruction |
| ACT | Arrest Car Thieves |
| ACT | Assailant Control Techniques |
| ACT | Assertive Community Treatment |
| ADA | Alternatives To Domestic Aggression |
| ADA | American Disabilities Act |
| ADA | Americans Dollars For Attorneys |
| ADA | Assistant District Attorney |
| ADA | Attorneys Dreams Answered |
| ADAM | Arrestee Drug Abuse Monitoring |
| ADAMS | Alcohol and Drub Abuse Managers and Supervisors |
| ADC | Assaulters Don't Camp |
| ADD | Adult Discipline Disorder |