- Baby Stores, Fairfield - Baby Accessories & Clothes
- Back Care Products, Fairfield
- Bacteriologists, Fairfield
- Bagel Restaurants, Fairfield
- Bagels, Fairfield
- Baker Equipment & Supplies, Fairfield - Donut Maker, etc
- Bakeries, Fairfield
- Balloons - Advertising & Signage, Fairfield
- Balloons - Novelty, Toy & Decorative, Fairfield
- Balloons Hot Air Manned Promo Etcetera, Fairfield
- Banks, Fairfield
- Banners, Flags, Pennants, Decals, Posters & Signs, Fairfield
- Banquet Halls, Fairfield
- Bar Coding Services, Fairfield
- Barber Shops, Fairfield
- Barrels & Drums, Fairfield
- Bars, Fairfield
- Bars & Grills, Fairfield
- Baseball & Softball Batting Ranges, Fairfield
- Basement Waterproofing - Waterproofing Contractors, Fairfield - Foundation & Concrete Waterproofing
- Baskets, Fairfield
- Bath Equipment & Supplies, Fairfield
- Bathroom Remodeling, Fairfield - Bathroom Remodel & Planning Services
- Batteries Dry Cell Manufacturers, Fairfield
- Batteries Dry Cell Wholesale, Fairfield
- Batteries Storage Manufacturers, Fairfield
- Battery, Fairfield - Retail Batteries Stores
- Battery Manufacturers, Fairfield
- Battery Repair & Rebuilding, Fairfield
- Battery Storage, Fairfield
- Battery Stores, Fairfield
- Bearings, Fairfield
- Beauty Salons, Fairfield
- Bedroom Furniture Stores, Fairfield - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Wine Stores, Fairfield
- Beer Taverns, Fairfield
- Belting & Belting Supplies Wholesale, Fairfield
- Belting Supplies & Equipment, Fairfield
- Benefit Administration, Fairfield
- Beverage & Juice Bottlers Manufacturers, Fairfield
- Beverage Non-Alcoholic Manufacturers, Fairfield
- Beverage Stores, Fairfield
- Beverages, Fairfield
- Billiard Supplies & Equipment, Fairfield - Pool Table
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- Bingo Halls, Supplies & Equipment, Fairfield
- Biological Products & Supplies, Fairfield
- Biological Research, Fairfield - Biological Labs
- Biotechnology Products & Services, Fairfield
- Blankets Retail, Fairfield
- Boats & Yachts, Fairfield - Yachts, Sailboats & Boats for Sale
- Boiler - New & Used, Fairfield - Radiant Heating
- Boiler Distributors & Manufacturers, Fairfield
- Book Binders & Folders, Fairfield - Office Supplies
- Book Publishers, Fairfield - Book Printing & Publishing
- Book Stores, Fairfield
- Bookkeeping Services Licensed, Fairfield
- Bookkeeping Systems & Services, Fairfield
- Books, Magazines & Newspapers Stores, Fairfield - Bookstores
- Boots Retail, Fairfield
- Bottles & Jars Used, Fairfield
- Bottling Manufacturing, Fairfield
- Boxing Clubs & Instruction, Fairfield
- Breakfast Restaurants, Fairfield
- Brick Masonry & Bricklayer Contractors, Fairfield - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Fairfield - Companies, Wholesale, Manufacturers & Suppliers
- Brooms & Brushes, Fairfield
- Builders & Contractors, Fairfield
- Builders & Contractors - More, Fairfield
- Builders Hardware Stores, Fairfield
- Building & Property Maintenance & Services, Fairfield
- Building Construction Consultants, Fairfield - Construction Management & Consulting
- Building Hardware & Materials, Fairfield
- Building Materials, Fairfield - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Fairfield
- Building Materials, Glass, Fairfield
- Building Site Preparation Contractors, Fairfield - Land Preparation & Land Clearing
- Burglar & Alarm Service, Fairfield - Monitoring Service
- Burglar Alarm Systems, Fairfield
- Bus Lines, Fairfield - Bus Transportation
- Business & Professional Associations, Fairfield
- Business & Trade Organizations, Fairfield
- Business Communication Consultants, Fairfield
- Business Forms, Systems & Supplies, Fairfield
- Business Legal Services, Fairfield
- Business Management Consultants, Fairfield
- Business Services, Fairfield
- Business, Vocational & Technical, Fairfield
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