| ACI | alliance Cooperative Internationale (skr.) |
|---|---|
| AEIF | European Association for Railway Interoperability (skr.), Európska asociácia pre interoperabilitu železníc (angl.skr.) |
| AOS | Advanced Operating System (skr.) |
| APEC | asian-pacific economic cooperation (skr.) |
| APEC | Asian-Pacific Economic Cooperation, Ázijsko-tichomorská spolupráca (angl.skr.) |
| DMO | Direct Mode Operation (skr.) |
| DMO | Direct Mode Operation, režim priameho spojenia (angl.skr.) |
| DOM | makro delete-operator-message (skr.) |
| DOS | Disk Operating System (skr.) |
| DRÁTENÍK | opera F. Škroupa |