- Antique furniture restoration service
- Agricultural organization
- Addiction treatment center
- Architectural designer
- Amusement machine supplier
- Advertising agency
- American restaurant
- ATM
- Apartment rental agency
- Architecture firm
- Antenna service
- Accountant
- Administrative attorney
- Aluminum supplier
- Apartment complex
- Asian grocery store
- Air conditioning repair service
- Audio visual equipment repair service
- Acoustical consultant
- Appliances customer service