| Abbreviation | Definition |
|---|---|
| ACT | Arrest Car Thieves |
| ACT | Assailant Control Techniques |
| ACT | Assertive Community Treatment |
| ACTL | American College of Trial Lawyers |
| ACTL | Amsterdam Centre for Tax Law |
| ACTO | Advocacy Centre for Tenants Ontario |
| ACTU | Anti Corruption and Transparency Unit |
| ACWL | Advisory Center on WTO Law |
| ACWL | American Crime Writers League |
| ADA | Alternatives to Domestic Aggression |
| ADA | American Disabilities Act |
| ADA | Americans Dollars For Attorneys |
| ADA | Assistant District Attorney |
| ADAG | Assistant Deputy Attorney General |
| ADAM | Arrestee Drug Abuse Monitoring |
| ADAMS | Alcohol and Drub Abuse Managers and Supervisors |
| ADC | Assaulters Don't Camp |
| ADD | Adult Discipline Disorder |
| ADD | Away Dad Disorder |
| ADEA | Age Discrimination in Employment Act |