- Advanced Kidney Care Medical
- Alexanders Pasta Express
- All Appliance Parts Co
- All God's Creatures Pro Pet
- All Gods Creatures Pro Pet Grm
- Allegheny Cemetery
- Allegheny County Health Dept
- Allegheny Neurological Assoc
- Allegheny North Arthritis Ctr
- Allegheny Service Institute
- Allegheny Tuberculosis Program
- Allegheny Valley Bank
