- Bakeries, Guilderland
- Banks, Guilderland
- Banquet Halls, Guilderland
- Baptist Churches, Guilderland
- Barbers, Guilderland
- Bars & Grills, Guilderland
- Beauty Salons, Guilderland
- Beverage Stores, Guilderland
- Bistros, Guilderland
- Boutiques & Boutique Items, Guilderland
- Brake Service & Repair, Guilderland - Brake Pads
- Breakfast Restaurants, Guilderland
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- Builders & Contractors, Guilderland
- Builders & Contractors - More, Guilderland
- Building Materials, Guilderland - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Guilderland
- Burglar Alarm Systems, Guilderland
- Business & Professional Associations, Guilderland
- Business & Trade Organizations, Guilderland
- Business Legal Services, Guilderland
- Business Management Consultants, Guilderland
- Business Services, Guilderland
- Business, Vocational & Technical, Guilderland
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