| Abbreviation | Definition |
|---|---|
| ATNE | Assault on Terok Nor Elite |
| ATNY | American Turners New York |
| ATO | Assist the Officer |
| ATORNY | Attorney |
| ATP | Alternative Transient Program |
| ATRA | American Tax Relief Act |
| ATS | Analytic Trouble Shooting |
| ATTAC | Advanced Tradewars Tactical Assault And Conquer |
| ATTEN | Appalachian Trail Traffic Enforcement Network |
| ATTY | An attorney, lawyer, or other case worker |
| ATTY | Attorney |
| ATTYGEN | Attorney General |
| AUSA | Assistant U S Attorney |
| AUSA | Assistant United States Attorney |
| AVH | Alcohol, Valium, and Hash |
| AVHS | Automatic Verification of Handwritten Signatures |
| AVL | Automated Vehicle Locator System |
| AVPS | Automated Violations Processing System |
| AVS | Age Verification Service |
| AVS | Anti Vocational Syndrome |