| Abbreviation | Definition |
|---|---|
| ASN | A Son Named .... |
| ASO | Anvil Shaped Object |
| ASOB | Alleged Sexual Offences Bill |
| ASP | Asinine Server Problems |
| ASS | Anti Sasuke Syndicate |
| ASSEMB | Assemblyman |
| ATA | Alternatives To Aggression |
| ATC | Addicted To Coke |
| ATC | Australian Tax Cases |
| ATCA | Alien Tort Claims Act |
| ATL | Above Tha Law |
| ATLA | American Trial Lawyers Association |
| ATLAS | Access To Legal Aid Services |
| ATM | All Time Murder |
| ATNY | American Turners New York |
| ATP | Alternative Transient Program |
| ATRA | American Tax Relief Act |
| ATS | Analytic Trouble Shooting |
| ATTY | Attorney |
| ATTYGEN | Attorney General |