- Bakeries, Millersville
- Balloons, Millersville
- Bank Supplies & Equipment, Millersville
- Bankruptcy Attorneys & Lawyers, Millersville
- Bankruptcy Attorneys & Lawyers, Millersville
- Bankruptcy Lawyers & Attorneys, Millersville
- Banks, Millersville
- Banquet Halls, Reception Halls & Party Facilities, Millersville
- Baptist Churches, Millersville
- Barber Shops, Millersville
- Barbers, Millersville
- Bars, Millersville
- Bars & Grills, Millersville
- Basement Waterproofing - Waterproofing Contractors, Millersville - Foundation & Concrete Waterproofing
- Bathroom Remodeling, Millersville - Bathroom Remodel & Planning Services
- Beach & Water Related Services, Millersville
- Beauty Salons, Millersville
- Beer Taverns, Millersville
- Behavioral Health Doctors, Physicians & Surgeons, Millersville - Behavioral Medicine
- Beverage Stores, Millersville
- Bid Information Service, Millersville
- Bid Report Service, Millersville
- Blouses, Shirts & Sweater Manufacturers, Millersville
- Boat & Saling Clubs, Millersville
- Boating & Swimming Clubs, Millersville
- Boiler - New & Used, Millersville - Radiant Heating
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- Bonds Surety & Fidelity, Millersville
- Bottled Gas, Lp Gas & Propane Dealers, Millersville
- Brake Service & Repair, Millersville - Brake Pads
- Breakfast Restaurants, Millersville
- Brick Masonry & Bricklayer Contractors, Millersville - Brick Mason - Install & Repair
- Builders & Contractors, Millersville
- Builders & Contractors - More, Millersville
- Building & Property Maintenance & Services, Millersville
- Building Construction Consultants, Millersville - Construction Management & Consulting
- Building Equipment Installation Contractors, Millersville
- Building Hardware & Materials, Millersville
- Building Materials, Millersville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Millersville
- Building Materials Commercial & Industrial, Millersville
- Burglar Alarm Systems, Millersville
- Bus Lines, Millersville - Bus Transportation
- Bus Lines Ticket Agencies, Millersville
- Bus Rental & Charter Bus Service, Millersville
- Bus Repair & Service, Millersville
- Business Communication Consultants, Millersville
- Business Insurance, Millersville
- Business Legal Services, Millersville
- Business Management Consultants, Millersville
- Business Services, Millersville
- Business, Vocational & Technical, Millersville
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