- Advantage Auto Stores
- Advantage Dealer Svc
- Advantage Mold & Design
- Aero-Tech Support
- Aflac
- Aflac
- Ag Choice Farm Credit
- Agriculture Dept
- Aim Electric
- Air Chemicals Inc
- Air Products & Chemicals Inc
- Air Products & Chemicals Inc
- Air Quality Control Bureau
- Airgas East
- Akron Products
- Alcoholics Anonymous
- Alden Fitness Ctr
- Alden Physical Therapy
- Alexander Vision
- All American Car Wash
- All Hands Massage Therapy
- All Tune & Lube
- All Tune Transmissions
- Allegheny Casualty Co
- Allegheny College
- Allegheny Commons
- Allegheny Professional Svc
- Allegheny Realty Settlement
- Allegheny Tool & Mfg Co
- Allegro Dance Arts
