- Bagel Restaurants, Portland
- Bagels, Portland
- Baked Goods, Snacks & Sweets, Portland
- Bakeries, Portland
- Baking Supplies & Needs, Portland - Flavoring Extracts, Flour & More
- Ballroom Dance Hall, Portland
- Bank Supplies & Equipment, Portland
- Bankruptcy Attorneys & Lawyers, Portland
- Bankruptcy Attorneys & Lawyers, Portland
- Bankruptcy Lawyers & Attorneys, Portland
- Banks, Portland
- Banquet Halls, Portland
- Baptist Churches, Portland
- Barbecue Restaurants, Portland
- Barber Shops, Portland
- Barbers, Portland
- Bars, Portland
- Bars & Grills, Portland
- Baseball Cards & Sports Memorabilia, Portland
- Basement Waterproofing - Waterproofing Contractors, Portland - Foundation & Concrete Waterproofing
- Basketball Clubs & Instruction, Portland
- Bathroom Fixtures, Portland - Bathroom Faucets, Bathtubs, Sinks, Shower Heads & Fixtures, etc
- Bathroom Remodeling, Portland - Bathroom Remodel & Planning Services
- Battery, Portland - Retail Batteries Stores
- Battery Storage, Portland
- Beauty Salons, Portland
- Bed & Breakfast, Portland
- Bedding Manufacturers Supplies, Portland
- Bedroom Furniture Stores, Portland - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Wine Stores, Portland
- Beer Brewing Supplies & Equipment, Portland
- Beer Taverns, Portland
- Bereavement Services, Portland
- Better Business Bureaus, Portland
- Beverage & Juice Bottlers Manufacturers, Portland
- Beverage Alcoholic, Portland
- Beverage Manufacturers, Portland
- Beverage Non-Alcoholic Manufacturers, Portland
- Beverage Stores, Portland
- Beverages, Portland
- Bibles Retail, Portland
- Bicycle Parts & Accessories, Portland
- Bicycle Rentals, Portland - Bike Rental
- Bicycle Repair & Service, Portland - Bike Repair Shops
- Bicycle Riding Instruction, Portland
- Bicycle Shops, Portland - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Billiard & Pool Parlors, Portland
- Billing Services, Portland
- Binoculars & Telescopes, Portland
- Biological Products & Supplies, Portland
- Biological Research, Portland - Biological Labs
- Biotechnology, Portland
- Bird Feeders & Supplies, Portland
- Bird Repellent, Barrier & Control, Portland
- Birth Control & Family Planning Clinics, Portland
- Bistros, Portland
- Blacksmiths, Portland
- Blood Bank & Center, Portland
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- Blueprint Service, Portland - Blueprinting Services
- Boat & Yacht Charter, Portland
- Boat & Yacht Charters, Portland
- Boat & Yacht Cleaning & Detailing, Portland
- Boat Covers, Tops & Upholstery, Portland
- Boat Motors & Marine Equipment Dealers, Portland
- Boat Services, Portland
- Boat Storage , Portland - Equipment & Services
- Boat, Yacht & Sail Boat Transport, Portland
- Boats & Yachts, Portland - Yachts, Sailboats & Boats for Sale
- Boiler & Furnace Contractors, Portland - Installation, Cleaning & Repair Services
- Boiler - New & Used, Portland - Radiant Heating
- Boiler Supplies & Equipment, Portland - Water Heaters & Boilers
- Bonds, Portland
- Bonds Surety & Fidelity, Portland
- Book Binders & Folders, Portland - Office Supplies
- Book Publishers, Portland - Book Printing & Publishing
- Book Stores, Portland
- Bookkeeping Services Licensed, Portland
- Bookkeeping Systems & Services, Portland
- Books, Magazines & Newspapers Stores, Portland - Bookstores
- Botanical & Zoological Gardens, Portland
- Bottled Gas, Lp Gas & Propane Dealers, Portland
- Bottling Manufacturing, Portland
- Boutiques & Boutique Items, Portland
- Bowling Centers, Portland
- Boxing Clubs & Instruction, Portland
- Brake Service & Repair, Portland - Brake Pads
- Breakfast Restaurants, Portland
- Brick Masonry & Bricklayer Contractors, Portland - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Portland - Companies, Wholesale, Manufacturers & Suppliers
- Buffet Restaurants, Portland
- Builders & Contractors, Portland
- Builders & Contractors - More, Portland
- Building & Property Maintenance & Services, Portland
- Building Construction Consultants, Portland - Construction Management & Consulting
- Building Hardware & Materials, Portland
- Building Materials, Portland - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Portland
- Building Materials, Glass, Portland
- Burglar & Alarm Service, Portland - Monitoring Service
- Burglar Alarm Systems, Portland
- Bus Lines, Portland - Bus Transportation
- Bus Lines Ticket Agencies, Portland
- Bus Rental & Charter Bus Service, Portland
- Business & Professional Associations, Portland
- Business & Trade Organizations, Portland
- Business Brokers, Portland
- Business Communication Consultants, Portland
- Business Forms, Systems & Supplies, Portland
- Business Insurance, Portland
- Business Legal Services, Portland
- Business Management Consultants, Portland
- Business Planning & Consulting, Portland
- Business Services, Portland
- Business Wholesale, Portland
- Business, Vocational & Technical, Portland
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