| AAS | Acid Addition System |
|---|---|
| AC | klimatizácia (angl.skr.), air-conditioning (skr.) |
| ACS | Air Conditioning System |
| ACT | Additional Centre Tank |
| ADD | Addition (skr.) |
| ADK | Additional Decryption Key |
| ADP | Antenna Digital Positioner |
| ADU | Application Definition Utility |
| ASR | Automatic Speech Recognition |
| CPA | Coalition Provisional Authority |