| AACO | Asian Americans for Community Outreach |
|---|---|
| ABC | Australian Broadcasting Commission |
| AC | anterior commissure (skr.), komisúra v mozgu (lat.skr.) |
| ACM | Arab Common Market (skr.) |
| ACS | Army Community Service |
| AEC | Atomic Energy Commision (skr.) |
| ATC | Air Training Command |
| ATC | Australian Telecommunications Commission |
| ATC | Australian Telecommunications Corporation |
| CCIR | Commité Consultatif International Radiocommunication, Medzinárodný poradný výbor pre rádiokomunikácie (franc.skr.) |