| AMR | American Airlines [engl.] Amerikanische Fluggesellschaft |
| AA | American Airlines [IATA-Airline-Code/ USA] |
| NA | North American Airlines [IATA-Airline-Code/ USA] |
| BFR | Berliner Flug Ring |
| DV | Lufttaxi Flug [IATA-Airline-Code/ Deutschland] |
| HF | Hapag-Lloyd Flug [IATA-Airline-Code/ Deutschland] |
| FC | Falcon Airlines Cargo Airlines [IATA-Airline-Code/ Vereinigte Arabische Emirate] |
| YX | Midwest Airlines / Midwest Express Airlines [IATA-Airline-Code / USA] |
| NW | Northwest Airlines / Northwest Orient Airlines [IATA-Airline-Code/ USA] |
| Am. Antiqu. | American Antiquity Zeitschrift |
| Amoco | American Oil Company Heute: BP |
| AMI | American Microsystems Inc. |
| ACLJ | American Center for Law and Justice Washington, DC, http://www.aclj.org |
| AMI | American Micro System Inc |
| AMS | American Mathematical Society |
| ARC | American Red Cross [engl.] |
| AMS | American Meteorological Society |
| ABA | American Bankers' Association Washington, DC, http://www.aba.com |
| AAF | American Air Force [engl.] Amerikanische Luftwaffe, http://www.af.mil |
| AOA | American Optometric Association |
| AJS | American Journal of Sociology Zeitschrift |
| AAP | American Association of Publishers Washington, DC, http://www.publishers.org |
| AMI | American Megatrends Inc. [engl.] |
| ADRs | American Depository Receipts |
| AIE | American Institute of Engineers |
| AGT | American Gaming Technologies |
| AGA | American Gas Association [engl.] Verband der amerikanische Gaslieferanten, http://www.aga.org |
| AJA | American Journal of Archaeology Zeitschrift |
| AJPh | American Journal of Philology Zeitschrift |
| AJSoc | American Journal of Sociology Zeitschrift |
| ALI | American Law Institute [engl.] |
| Am. J. Archaeol. | American Journal of Archaeology Zeitschrift |
| Am. J. Sci. | American Journal of Science Zeitschrift |
| Am. Midl. Nat. | American Midland Naturalist Zeitschrift |
| aeo | American Eyes Only [engl.] |
| AEI | American Enterprise Institute Washington, DC, http://www.aei.org |
| AMA | American Medical Association Chicago, [IL], http://www.ama-assn.org |
| AMC | American Motors Corporation vgl. http://www.american-motors.de |
| AE | American Express [engl.] |
| AHR | The American Historical Review Zeitschrift |
| ASR | American Sociological Review Zeitschrift |
| A.G. | American Gallon [engl.] entspricht 3,785 Liter |
| ATI | American Tasting Institute |
| JAH | The Journal of American History Zeitschrift |
| JAmH | Journal of American History Zeitschrift |
| ATT | American Telephone & Telegraph amerikanischer Telekommunikationskonzern |
| DAR | Daughters of the American Revolution |
| FAS | Federation of American Scientists Washington, DC, http://www.fas.org |
| ASocRev | American Sociological Review Zeitschrift |
| A.P. | American Patent [engl.] amerikanisches Patent |