| Abbreviation | Definition |
|---|---|
| AMSB | Automate My Small Business |
| AMSI | Anderson Mechanical Services Inc |
| AMSI | ASTA Marketing Services Inc |
| AMSL | Ace Manufacturing Systems Ltd |
| AMSL | Asiri Medical Services, Limited |
| AMSR | American Security Resources Corporation |
| AMST | Advanced Micro-Silicon Technology |
| AMT | Arcadia Machine and Tool |
| AMTC | Advanced Modern Technologies Corporation |
| AMTC | Applied Media Technologies Corporation |
| AMTRAN | AMerican TRANsportation Corporation |
| Amul | Anand Milk Union Limited |
| AMWAY | AMerican WAY of Life |
| AMWC | Atascadero Mutual Water Company |
| AMWI | Advanced Metal Works Inc |
| AMZ | AMZ Productions, Inc. |
| AMZ | Auto Motor Zone |
| ANA | All Nippon Airways |
| ANA | All-Nippon Airways |
| ANAC | Asia Nikan Atlas Company, LTD. |