| ACY | Atlantic City International USA, New Jersey [Internationaler Airport Code] |
| AIY | Atlantic City Bader Field USA, New Jersey [Internationaler Airport Code] |
| FGHE | Fractional Quantum Hall Effect |
| ES 17 | Städt. Schlachthof Schwäbisch Hall Schwäbisch Hall, Baden-Württemberg |
| IQHE | Integer Quantum Hall Effect |
| LMH | Lady Margaret Hall [University of Oxford] vgl. http://www.admissions.ox.ac.uk/colleges/lady.shtml |
| SHA | Schwäbisch Hall / Baden-Württemberg, KFZ-Kürzel |
| EFH | Extended Fenske-Hall [LCAO] [Methode] |
| UNC | Universal Naming Convention |
| CRC | Convention on the Rights of the Child Kinderrechtsausschuß |
| ITC | international telecommunications convention vgl. Genf, http://www.itu.int |
| GCB | German Convention Bureau e.V. |
| IBC | International Broadcasting Convention |
| UNC | Unique / Universal Naming Convention |
| ICCC | Inter-Client Communication Convention |
| CBD | Convention on Biological Diversity [engl.] UN-Vereinbarung über biologische Artenvielfalt |
| COTIF | Convention relative aux Transports Internationaux Ferroviaires Übereinkommen über den internationalen Eisenbahnverkehr |
| CCD | Convention on Combating Desertification and Drought [engl.] UN-Konvention zur Bekämpfung der Wüstenbildung |
| CITES | Convention on International Trade in Endangered Species of wild fauna and flora Übereinkommen über den internationalen Handel mit gefährdeten Arten frei lebender Tiere und Pflanzen |
| AIO | Atlantic USA, Iowa [Internationaler Airport Code] |
| NAI | New Atlantic Initiative vgl. Washington, DC, http://www.aei.org |
| BBC | Bay City USA, Texas [Internationaler Airport Code] |
| SAA | South Atlantic Anomaly |
| HH-EFU 104 | Atlantic-Frost GmbH Hamburg, Hamburg |
| NAO | North Atlantic Oscillation |
| TEAM | The European- Atlantic Movement London, http://www.european-atlantic.org.uk |
| NAC | North Atlantic Council Brüssel, http://www.nato.int/docu/handbook/2001/hb070101.htm |
| AT | Atlantic Time [engl.] |
| ARCO | Atlantic Richfield Company |
| CSN | Carson City USA, Nevada [Internationaler Airport-Code] |
| MGC | Michigan City USA, Indiana [Internationaler Airport-Code] |
| NYC | New York City Metropole an der Ostküste der USA |
| CDC | Cedar City USA, Utah [Internationaler Airport-Code] |
| CCY | Charles City USA, Iowa [Internationaler Airport-Code] |
| VII | Vinh City Vietnam [Internationaler Airport-Code] |
| ALX | Alexander City USA, Alabama [Internationaler Airport Code] |
| TVC | Traverse City USA, Michigan [Internationaler Airport-Code] |
| BLD | Boulder City USA, Nevada [Internationaler Airport Code] |
| BMC | Brigham City USA, Utah [Internationaler Airport Code] |
| BNI | Benin City Nigeria [Internationaler Airport Code] |
| CCS | Cargo City Süd Frachtteil des Frankfurter Flughafens |
| SVC | Silver City USA, New Mexiko [Internationaler Airport-Code] |
| CC | City Council |
| TAT | Trans-Atlantic Telephone Cable vgl. http://www.iscpc.org/cabledb/atlan_page.htm |
| ACC | Atlantic Crossing Cable [engl.] LWL-Verbindung nach Amerika |
| ACL | Atlantic Continental Line [engl.] Rotterdam, http://www.continentalline.org |
| ADT | Atlantic Daylight Time [engl.] Atlantische Sommerzeit |
| TABD | Trans-Atlantic Business Dialogue Brüssel/ Washington, DC, http://www.tabd.com |
| ASA | Astronomical Society of the Atlantic [engl.] |
| AST | Atlantic Standard Time [engl.] Amerikanische Zeitzone |