| ACI | Automobileclub Italien (skr.) |
|---|---|
| ADA | Australian Dental Association |
| ADC | Analog-Digital Combiner |
| ADD | Administration on Developmental Disabilities |
| ADD | Advanced Digital Design |
| ADD | Army Digital Division |
| ADL | Area Dental Laboratory |
| ADN | Advanced Digital Network |
| ADP | Accidental Damage Protection |
| ADP | Antenna Digital Positioner |