- Arts organization
- Arena
- Aerospace company
- Auto repair shop
- Auto parts store
- Adult education school
- Alcoholic beverage wholesaler
- Architect
- Agricultural service
- Aquatic centre
- Accountant
- Airport
- Asphalt contractor
- Aircraft maintenance company
- Auto electrical service
- Auto restoration service
- Auto upholsterer
- Airbrushing supply store
- Amphitheater
- Airline