- Audiovisual equipment rental service
- Agriculture
- Abortion clinic
- Alcohol manufacturer
- Airport shuttle service
- Audiologist
- Aircraft maintenance company
- Air compressor repair service
- Airline
- Auto accessories wholesaler
- Auto chemistry shop
- Auto sunroof shop
- Apartments
- Accounting firm
- Accounting school
- Artificial plant supplier
- Adult foster care service
- Alcoholism treatment program
- Apprenticeship center
- Archery club