- Advertising agency
- Automation company
- Attorney
- Auditor
- Accountant
- Auto broker
- Accounting firm
- Auditorium
- Art center
- Architect
- Auto machine shop
- Auto dent removal service
- Auto parts manufacturer
- Appliance repair service
- Auto repair shop
- Antenna service
- Auto parts store
- Agricultural product wholesaler
- Appliance store
- Audio visual equipment supplier