- Automation company
- Air conditioning repair service
- Association or organization
- Advertising service
- Auto insurance agency
- Accounting firm
- Architecture firm
- Auto parts manufacturer
- Aluminum window
- Auto tune up service
- Aerated drinks supplier
- Acrylic store
- Animation studio
- Art dealer
- Art school
- Acoustical consultant
- Auto body parts supplier
- Aircraft maintenance company
- Auto market
- Asian household goods store