- Bakeries, Portsmouth
- Banks, Portsmouth
- Banquet Halls, Portsmouth
- Bars, Portsmouth
- Bars & Grills, Portsmouth
- Bartending Service, Portsmouth
- Beauty Salons, Portsmouth
- Bed & Breakfast, Portsmouth
- Beer & Wine Stores, Portsmouth
- Beer Taverns, Portsmouth
- Beverage Stores, Portsmouth
- Boat & Yacht Charter, Portsmouth
- Boat Covers, Tops & Upholstery, Portsmouth
- Boat Lettering & Signs, Portsmouth - Boat Painting
- Boat Maintenance, Portsmouth
- Boat Services, Portsmouth
- Boats & Yachts, Portsmouth - Yachts, Sailboats & Boats for Sale
- Bonds, Portsmouth
- Book Stores, Portsmouth
- Bookkeeping Services Licensed, Portsmouth
- Bookkeeping Systems & Services, Portsmouth
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- Breakfast Restaurants, Portsmouth
- Brick Masonry & Bricklayer Contractors, Portsmouth - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Portsmouth - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Portsmouth
- Builders & Contractors - More, Portsmouth
- Builders Hardware Stores, Portsmouth
- Building & House Movers & Raising Contractors, Portsmouth
- Building & Property Maintenance & Services, Portsmouth
- Building Construction Consultants, Portsmouth - Construction Management & Consulting
- Building Hardware & Materials, Portsmouth
- Building Materials & Supplies, Portsmouth
- Building Site Preparation Contractors, Portsmouth - Land Preparation & Land Clearing
- Bus Rental & Charter Bus Service, Portsmouth
- Business & Professional Associations, Portsmouth
- Business Communication Consultants, Portsmouth
- Business Legal Services, Portsmouth
- Business Management Consultants, Portsmouth
- Business Services, Portsmouth
- Business Studio Rental, Portsmouth
- Business, Vocational & Technical, Portsmouth
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