| AMI | American Microsystems Inc. |
| Amoco | American Oil Company Heute: BP |
| Am. Antiqu. | American Antiquity Zeitschrift |
| ASocRev | American Sociological Review Zeitschrift |
| AGT | American Gaming Technologies |
| AMR | American Airlines [engl.] Amerikanische Fluggesellschaft |
| AGA | American Gas Association [engl.] Verband der amerikanische Gaslieferanten, http://www.aga.org |
| AMS | American Meteorological Society |
| AOA | American Optometric Association |
| ARC | American Red Cross [engl.] |
| ACLJ | American Center for Law and Justice Washington, DC, http://www.aclj.org |
| ALI | American Law Institute [engl.] |
| AEI | American Enterprise Institute Washington, DC, http://www.aei.org |
| AE | American Express [engl.] |
| ADRs | American Depository Receipts |
| aeo | American Eyes Only [engl.] |
| AJSoc | American Journal of Sociology Zeitschrift |
| AMI | American Micro System Inc |
| AJS | American Journal of Sociology Zeitschrift |
| AJPh | American Journal of Philology Zeitschrift |
| AMS | American Mathematical Society |
| Am. J. Archaeol. | American Journal of Archaeology Zeitschrift |
| Am. J. Sci. | American Journal of Science Zeitschrift |
| AJA | American Journal of Archaeology Zeitschrift |
| Am. Midl. Nat. | American Midland Naturalist Zeitschrift |
| Am. Mus. Novit. | American Museum Novitates Zeitschrift |
| AMA | American Medical Association Chicago, [IL], http://www.ama-assn.org |
| AMC | American Motors Corporation vgl. http://www.american-motors.de |
| AIE | American Institute of Engineers |
| AMI | American Megatrends Inc. [engl.] |
| AHR | The American Historical Review Zeitschrift |
| ASR | American Sociological Review Zeitschrift |
| FAS | Federation of American Scientists Washington, DC, http://www.fas.org |
| JAH | The Journal of American History Zeitschrift |
| DAR | Daughters of the American Revolution |
| FAR | Federation of American Research |
| ABA | American Bankers' Association Washington, DC, http://www.aba.com |
| DAV | Disabled American Veterans |
| AAP | American Association of Publishers Washington, DC, http://www.publishers.org |
| AAF | American Air Force [engl.] Amerikanische Luftwaffe, http://www.af.mil |
| JAmH | Journal of American History Zeitschrift |
| ATI | American Tasting Institute |
| A.G. | American Gallon [engl.] entspricht 3,785 Liter |
| ATT | American Telephone & Telegraph amerikanischer Telekommunikationskonzern |
| A.P. | American Patent [engl.] amerikanisches Patent |
| AMG | American Military Government [engl.] |
| FARNET | Federation of American Research Networks Washington, DC, http://www.farnet.org |
| AMI | American Methanol Institute [engl.] |
| AJIL | American Journal for International Law [engl.] Juristische Zeitschrift |
| CAP | College of American Pathologists [engl.] Amerikanischer Pathologen-Verband |