| Abbreviation | Definition |
|---|---|
| ADA | Alaska Division of Agriculture |
| ADA | All -Day Appointment |
| ADA | Analog Digital Associates |
| ADA | Annemarie's Dance Academy |
| ADA | Athletic Dealers of America |
| ADAC | Abu Dhabi Airports Company |
| ADAC | Association Dues Assurance Corporation |
| ADAG | Anil Dhirubhai Ambani Group |
| ADAP | American Discount Auto Parts |
| ADB | Adrien de Backer |
| ADBG | African Development Bank Group |
| ADBL | Alan Dick Broadcast Ltd |
| ADC | Alexandria Drafting Company |
| ADC | American Diagnostic Corporation |
| ADC | American Dryer Corporation |
| ADC | Applied Data Corp |
| ADC | Applied Data Corporation |
| ADC | Arizona Designer Craftsmen |
| ADC | Audio Dynamics Corporation |
| ADC | Automatic Devices Company |