- Paint & Painting Supplies, Guilderland
- Paint Stores, Guilderland
- Paving Contractors - Driveway, Road, Walkway, Guilderland - Installation, Repair & Seal - Asphalt & Concrete Pavers
- Personal Care, Guilderland
- Personal Credit Institutions & Services, Guilderland
- Personal Legal Services, Guilderland
- Personal Services, Guilderland
- Pet Care Services, Guilderland
- Pet Grooming & Boarding Services, Guilderland
- Photo & Picture Frames, Guilderland - Picture Framing
- Photographers, Guilderland
- Photography, Guilderland
- Piano & Organ Stores & Dealers - Sales & Rental, Guilderland
- Picture Hanging Service, Guilderland
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- Playgrounds Parks & Trails, Guilderland
- Plumbers & Plumbing Contractors, Guilderland - Installation, Repair & Replace Services
- Plumbing - Sewer & Drain Cleaning & Repair, Guilderland
- Podiatrists, Guilderland - Foot Doctors, Physicians & Surgeons (Podiatric Medicine)
- Presbyterian Churches, Guilderland
- Preschools, Guilderland
- Printers Services, Guilderland
- Proctologists, Guilderland - Proctology Doctors, Physicians & Surgeons
- Professional, Guilderland
- Property Operation - Retail Outlet Mall & Establishments, Guilderland
- Prosthodontist, Guilderland - Partial Dentures, Dental Implant, Bridge, Crown, etc
- Public Health Program Administration, Guilderland
- Public Libraries, Guilderland
- Publishing & Printing Manufacturers, Guilderland
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