| AAS | Advances in the Astronautical Sciences |
|---|---|
| AAS | Arabian Advanced Systems |
| ABC | Advanced Base Component |
| ABE | Advanced Boresight Equipment |
| ABI | Advanced Binary Interface (skr.) |
| ABI | Advanced Boundary Information |
| ABT | Advanced Backplane Technology |
| ABÚ SIMBEL | dva staroegyptské skalné chrámy |
| AC | acetátový hodváb (skr.) |
| AC | Advanced Chemistry, nemecká rapová skupina |