- Bagel Restaurants, Stony Brook
- Bagels, Stony Brook
- Bakeries, Stony Brook
- Bank Supplies & Equipment, Stony Brook
- Banks, Stony Brook
- Banquet Halls, Stony Brook
- Baptist Churches, Stony Brook
- Barbecue Restaurants, Stony Brook
- Barbers, Stony Brook
- Bars & Grills, Stony Brook
- Batteries Dry Cell Manufacturers, Stony Brook
- Batteries Dry Cell Wholesale, Stony Brook
- Battery Manufacturers, Stony Brook
- Battery Stores, Stony Brook
- Beauty Salons, Stony Brook
- Beer & Wine Stores, Stony Brook
- Beverage Stores, Stony Brook
- Bicycle Rentals, Stony Brook - Bike Rental
- Bicycle Repair & Service, Stony Brook - Bike Repair Shops
- Boating & Swimming Clubs, Stony Brook
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- Bonds, Stony Brook
- Book Stores, Stony Brook
- Boutiques & Boutique Items, Stony Brook
- Breakfast Restaurants, Stony Brook
- Builders & Contractors, Stony Brook
- Builders & Contractors - More, Stony Brook
- Building & Home Inspection, Stony Brook - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Stony Brook - Construction Management & Consulting
- Building Design & Construction Consultants, Stony Brook
- Building Materials, Stony Brook - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Stony Brook
- Building Site Preparation Contractors, Stony Brook - Land Preparation & Land Clearing
- Burglar Alarm Systems, Stony Brook
- Business & Professional Associations, Stony Brook
- Business & Trade Organizations, Stony Brook
- Business Insurance, Stony Brook
- Business Legal Services, Stony Brook
- Business Management Consultants, Stony Brook
- Business Services, Stony Brook
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