- Assembly Plus
- Assist 2 Sell
- Associated Bag Co
- Associated Foot & Ankle Spec
- Associated Teeth Whitening Ctr
- Associated Wholesalers Inc
- Associates In Adult Medicine
- Association Of Food & Drug
- Association Of Test Publishers
- Athletic Lettering
- Atlas Rubber Stamp & Printing
- ATR Magnetics
- Audio Clinic
- Audio Professional Hearing
- Audio/Video Contractors-York
