- Baby Stores, New Britain - Baby Accessories & Clothes
- Bail Bonds, New Britain
- Bakeries, New Britain
- Bank Supplies & Equipment, New Britain
- Bankruptcy Attorneys & Lawyers, New Britain
- Bankruptcy Attorneys & Lawyers, New Britain
- Bankruptcy Lawyers & Attorneys, New Britain
- Banks, New Britain
- Banquet Halls, New Britain
- Banquet Halls, Reception Halls & Party Facilities, New Britain
- Banquets & Reception Services, New Britain
- Baptist Churches, New Britain
- Barbecue Restaurants, New Britain
- Barber Shop & Beauty Salon Supplies & Equipment, New Britain - Beauty & Barber Supplies
- Barber Shops, New Britain
- Barbers, New Britain
- Bars, New Britain
- Bars & Grills, New Britain
- Baseball & Softball Clubs, New Britain
- Bathroom Remodeling, New Britain - Bathroom Remodel & Planning Services
- Bathtubs & Sinks - Repair & Refinishing, New Britain - Bathtub Refinishing, Repair & Resurfacing
- Batteries Storage Manufacturers, New Britain
- Battery, New Britain - Retail Batteries Stores
- Battery Manufacturers, New Britain
- Battery Storage, New Britain
- Beauty Cosmetic & Salon Equipment & Supplies Manufacturers, New Britain
- Beauty Salons, New Britain
- Beer & Wine Stores, New Britain
- Beer Taverns, New Britain
- Belting & Belting Supplies Wholesale, New Britain
- Belting Supplies & Equipment, New Britain
- Beverage & Juice Bottlers Manufacturers, New Britain
- Beverage Non-Alcoholic Manufacturers, New Britain
- Beverage Stores, New Britain
- Bible Church, New Britain
- Bill Payment Service, New Britain
- Billing Services, New Britain
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- Biological Research, New Britain - Biological Labs
- Biotechnology Products & Services, New Britain
- Boiler Rental, New Britain
- Bonds Surety & Fidelity, New Britain
- Book Binders & Folders, New Britain - Office Supplies
- Book Stores, New Britain
- Books, Magazines & Newspapers Stores, New Britain - Bookstores
- Boots Retail, New Britain
- Bottled Gas, Lp Gas & Propane Dealers, New Britain
- Bottling Manufacturing, New Britain
- Brake Service & Repair, New Britain - Brake Pads
- Breakfast Restaurants, New Britain
- Brick Masonry & Bricklayer Contractors, New Britain - Brick Mason - Install & Repair
- Bridge, Tunnel & Elevated Highway Contractors, New Britain
- Buddhist Churches, New Britain
- Builders & Contractors, New Britain
- Builders & Contractors - More, New Britain
- Building & Home Inspection, New Britain - Real Estate, Building, Land & House Inspection Service
- Building & Property Maintenance & Services, New Britain
- Building Cleaning - Exterior, New Britain - Cleaning Service
- Building Construction Consultants, New Britain - Construction Management & Consulting
- Building Hardware & Materials, New Britain
- Building Materials, New Britain - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, New Britain
- Burglar Alarm Systems, New Britain
- Bus Lines, New Britain - Bus Transportation
- Bus Lines Ticket Agencies, New Britain
- Bus Rental & Charter Bus Service, New Britain
- Business & Professional Associations, New Britain
- Business Insurance, New Britain
- Business Legal Services, New Britain
- Business Management Consultants, New Britain
- Business Services, New Britain
- Business Wholesale, New Britain
- Business, Vocational & Technical, New Britain
- Butchers & Meat Markets - Manufacturers, New Britain
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