- Bakeries, Portland
- Bank Supplies & Equipment, Portland
- Banks, Portland
- Baptist Churches, Portland
- Barbers, Portland
- Basement Waterproofing - Waterproofing Contractors, Portland - Foundation & Concrete Waterproofing
- Beauty Salons, Portland
- Bedding & Linens Stores, Portland - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Beverage Stores, Portland
- Boat Services, Portland
- Boats & Yachts, Portland - Yachts, Sailboats & Boats for Sale
- Bonds, Portland
- Bookkeeping Services Commercial, Portland
- Bookkeeping Systems & Services, Portland
- Bottled Gas, Lp Gas & Propane Dealers, Portland
- Box Manufacturers Equipment & Supplies, Portland
- Brake Lining Manufacturers, Portland
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- Brake Service & Repair, Portland - Brake Pads
- Breakfast Restaurants, Portland
- Brick Masonry & Bricklayer Contractors, Portland - Brick Mason - Install & Repair
- Bronze Tablets, Portland
- Builders & Contractors, Portland
- Builders & Contractors - More, Portland
- Building & Property Maintenance & Services, Portland
- Building Materials, Portland - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Portland
- Building Restoration & Preservation, Portland
- Burglar Alarm Systems, Portland
- Bus Lines, Portland - Bus Transportation
- Business Insurance, Portland
- Business Legal Services, Portland
- Business Services, Portland
- Business, Vocational & Technical, Portland
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