- Backhoe & Bulldozer Contractors, Ottawa - Backhoe & Dozer Services
- Banks, Ottawa
- Banquet Halls, Ottawa
- Baptist Churches, Ottawa
- Barbers, Ottawa
- Bars & Grills, Ottawa
- Battery, Ottawa - Retail Batteries Stores
- Battery Storage, Ottawa
- Beauty Salons, Ottawa
- Bed & Breakfast, Ottawa
- Beer & Wine Stores, Ottawa
- Bonds, Ottawa
- Book Stores, Ottawa
- Bookkeeping Services Licensed, Ottawa
- Bookkeeping Systems & Services, Ottawa
- Books, Magazines & Newspapers Stores, Ottawa - Bookstores
- Bottled Gas, Lp Gas & Propane Dealers, Ottawa
- Bowling Centers, Ottawa
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- Brake Service & Repair, Ottawa - Brake Pads
- Brick Clay Common Face, Ottawa
- Bricks, Blocks & Stone Products, Ottawa - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Ottawa
- Builders & Contractors - More, Ottawa
- Builders Hardware Stores, Ottawa
- Building Equipment Installation Contractors, Ottawa
- Building Hardware & Materials, Ottawa
- Building Materials & Supplies, Ottawa
- Building Site Preparation Contractors, Ottawa - Land Preparation & Land Clearing
- Business & Professional Associations, Ottawa
- Business & Trade Organizations, Ottawa
- Business Legal Services, Ottawa
- Business Management Consultants, Ottawa
- Business Services, Ottawa
- Butcher Shops, Ottawa
- Butchers & Meat Markets - Manufacturers, Ottawa
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