- Baby Stores, Towson - Baby Accessories & Clothes
- Bagel Restaurants, Towson
- Bagels, Towson
- Bail Bonds, Towson
- Bakeries, Towson
- Balloon Manufacturers, Towson
- Bank Supplies & Equipment, Towson
- Banking Attorneys & Lawyers, Towson
- Banking Attorneys & Lawyers, Towson
- Banking Lawyers & Attorneys, Towson
- Bankruptcy Attorneys & Lawyers, Towson
- Bankruptcy Attorneys & Lawyers, Towson
- Bankruptcy Lawyers & Attorneys, Towson
- Banks, Towson
- Banquet Halls, Towson
- Banquet Halls, Reception Halls & Party Facilities, Towson
- Baptist Churches, Towson
- Barber Shops, Towson
- Barbers, Towson
- Bars, Towson
- Bars & Grills, Towson
- Basement Waterproofing - Waterproofing Contractors, Towson - Foundation & Concrete Waterproofing
- Bathroom Fixtures, Towson - Bathroom Faucets, Bathtubs, Sinks, Shower Heads & Fixtures, etc
- Bathroom Remodeling, Towson - Bathroom Remodel & Planning Services
- Bathtubs & Sinks - Repair & Refinishing, Towson - Bathtub Refinishing, Repair & Resurfacing
- Battery Stores, Towson
- Beach & Water Related Services, Towson
- Beads Decor, Towson
- Beauty Consultants, Towson
- Beauty Salons, Towson
- Bed Manufacturers, Towson
- Bedding & Linens Stores, Towson - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedroom Furniture Manufacturers, Towson
- Bedroom Furniture Stores, Towson - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Wine Stores, Towson
- Beer Taverns, Towson
- Beverage Dispenser Supplies & Equipment , Towson - Beverage Dispensing
- Beverage Stores, Towson
- Bicycle Rentals, Towson - Bike Rental
- Bicycle Repair & Service, Towson - Bike Repair Shops
- Bicycle Shops, Towson - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Big & Tall Men's Clothing, Towson
- Billiard Supplies & Equipment, Towson - Pool Table
- Bistros, Towson
- Boat Services, Towson
- Boat Storage , Towson - Equipment & Services
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- Boating & Swimming Clubs, Towson
- Bonds, Towson
- Bonds Surety & Fidelity, Towson
- Book Publishers, Towson - Book Printing & Publishing
- Book Stores, Towson
- Bookkeeping Services Licensed, Towson
- Bookkeeping Systems & Services, Towson
- Books, Magazines & Newspapers Stores, Towson - Bookstores
- Bottlers Equipment & Supplies, Towson
- Boutique Items Manufacturers, Towson
- Boutiques & Boutique Items, Towson
- Bowling Apparel & Accessories, Towson
- Bowling Centers, Towson
- Brake Service & Repair, Towson - Brake Pads
- Brakes & Brake Parts, Towson - Brake Pads, Rotors, Calipers, Lines, etc
- Breakfast Restaurants, Towson
- Breast Screening Services, Towson
- Brew Pubs, Towson
- Brooms & Brushes Manufacturers, Towson
- Buffet Restaurants, Towson
- Builders & Contractors, Towson
- Builders & Contractors - More, Towson
- Builders Hardware Stores, Towson
- Building & Home Inspection, Towson - Real Estate, Building, Land & House Inspection Service
- Building & Property Maintenance & Services, Towson
- Building Construction Consultants, Towson - Construction Management & Consulting
- Building Design & Construction Consultants, Towson
- Building Hardware & Materials, Towson
- Building Materials, Towson - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Towson
- Building Site Preparation Contractors, Towson - Land Preparation & Land Clearing
- Burglar & Alarm Service, Towson - Monitoring Service
- Burglar & Alarm Services - Commercial And Industrial, Towson
- Burglar Alarm Systems, Towson
- Burglar Alarm Systems - Commercial And Industrial, Towson
- Business & Professional Associations, Towson
- Business & Trade Organizations, Towson
- Business Brokers, Towson
- Business Communication Consultants, Towson
- Business Insurance, Towson
- Business Legal Services, Towson
- Business Management Consultants, Towson
- Business Planning & Consulting, Towson
- Business Services, Towson
- Business Wholesale, Towson
- Business, Vocational & Technical, Towson
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