| AACO | Arab Air Carriers Organization |
|---|---|
| AACO | Arab Air Carries Organization, Arabská organizácia leteckých dopravcov (angl.skr.) |
| ABS | Automatic Brightness Stabilization controller (skr.) |
| AC | authorization certificate (skr.) |
| AEO | Atomic Energy Organization |
| CORI | Contracting and Organizations Research Institute |
| ECCO | European Council of Enlist Organization |
| ECO | Economic Cooperation Organization, Organizácia pre hospodársku spoluprácu, medzinárodná organizácia 10 ázijských krajín |
| ECO | European Coal Organization (skr.) |
| ISO | independent sales organization (skr.), nezávislá odbytová organizácia (angl.skr.) |