| AAC | Academic Advisory Center |
|---|---|
| AC | assessment center (skr.) |
| ADC | Advanced Development Centers |
| ADC | Air Defense Center |
| AED | Attraction and Entertainment Design |
| AEI | American Enterprise Institute |
| AEO | Association for Enterprise Opportunity |
| ATC | Asia and The Pacific Ocean Trade Center (skr.) |
| CASA | Center for Alternativ Samfundsanalyse (skr.) |
| CASA | Center on Addiction and Substance Abuse |