- Advanced Health Chiropractic
- Advanced Ophthalmology East
- Advanced Wireless
- Advantage Wireless
- Advisors
- Aegis Settlement Svc
- Aegis Whollesale
- Aero-Dyna-Kelln Chimney Sweeps
- Aeropostale
- Affirmed Medical Svc
- Affordable Appliance Svc
- After Hours Formal Wear
- Aid Association For Lutherans
- Aiman's Snack Shop
- Air Tech Radon Svc
- AIT Business Svc
- Aldo Shoes
- Alfred Angelo Bridal Inc
- Alfredo's Salon Of Hair Design
- Alhumra Grocery
- All Aboard Pet Grooming
- All About Eyes
- All American Equip & Const Inc
- All Appliance Parts Co
- All Clean Gutter Cleaning
- All Safe Document Destruction
- All Services Construction
- All Wound Up
- Allcare Dental & Dentures
- Allegheny County Dist Justice
- Allegheny Dermatology Assoc
- Allegheny East Mental Health
- Allegheny East Mental Health
- Allegheny Fire Systems
- Allegheny Hearing Instruments
- Allegheny Inspection Co
- Allegheny Valley Bank
