- Baby Stores, Martinsburg - Baby Accessories & Clothes
- Bail Bonds, Martinsburg
- Bakeries, Martinsburg
- Bankruptcy Attorneys & Lawyers, Martinsburg
- Bankruptcy Attorneys & Lawyers, Martinsburg
- Bankruptcy Lawyers & Attorneys, Martinsburg
- Bankruptcy Services, Martinsburg
- Banks, Martinsburg
- Banners, Flags, Pennants, Decals, Posters & Signs, Martinsburg
- Banquet Halls, Martinsburg
- Banquet Halls, Reception Halls & Party Facilities, Martinsburg
- Baptist Churches, Martinsburg
- Barber Shops, Martinsburg
- Barbers, Martinsburg
- Bars, Martinsburg
- Bars & Grills, Martinsburg
- Bathroom Remodeling, Martinsburg - Bathroom Remodel & Planning Services
- Battery, Martinsburg - Retail Batteries Stores
- Battery Storage, Martinsburg
- Beauty Salons, Martinsburg
- Bedding & Linens Stores, Martinsburg - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedroom Furniture Stores, Martinsburg - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Ale - Wholesale, Martinsburg
- Beer & Wine Stores, Martinsburg
- Beer Taverns, Martinsburg
- Beverage Stores, Martinsburg
- Beverages, Martinsburg
- Bible Church, Martinsburg
- Bible Study Schools, Martinsburg
- Bicycle Shops, Martinsburg - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Bird Repellent, Barrier & Control, Martinsburg
- Bistros, Martinsburg
- Board Of Education, Martinsburg
- Boat Services, Martinsburg
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- Bonds, Martinsburg
- Book Stores, Martinsburg
- Bookkeeping Services Licensed, Martinsburg
- Bookkeeping Systems & Services, Martinsburg
- Books, Magazines & Newspapers Stores, Martinsburg - Bookstores
- Boutiques & Boutique Items, Martinsburg
- Bowling Centers, Martinsburg
- Brake Service & Repair, Martinsburg - Brake Pads
- Breakfast Restaurants, Martinsburg
- Brick & Structural Product Manufacturers, Martinsburg
- Brick Clay Common Face, Martinsburg
- Brick Masonry & Bricklayer Contractors, Martinsburg - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Martinsburg - Companies, Wholesale, Manufacturers & Suppliers
- Bronze & Bronze Products, Martinsburg
- Buffet Restaurants, Martinsburg
- Builders & Contractors, Martinsburg
- Builders & Contractors - More, Martinsburg
- Building & Home Inspection, Martinsburg - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Martinsburg - Construction Management & Consulting
- Building Hardware & Materials, Martinsburg
- Building Materials, Martinsburg - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Martinsburg
- Building Restoration & Preservation, Martinsburg
- Burglar & Alarm Service, Martinsburg - Monitoring Service
- Burglar Alarm Systems, Martinsburg
- Business & Professional Associations, Martinsburg
- Business Development, Martinsburg
- Business Insurance, Martinsburg
- Business Legal Services, Martinsburg
- Business Management Consultants, Martinsburg
- Business Planning & Organizing, Martinsburg
- Business Services, Martinsburg
- Business, Vocational & Technical, Martinsburg
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