- Bail Bonds, Severn
- Bakeries, Severn
- Bank Supplies & Equipment, Severn
- Banks, Severn
- Barbers, Severn
- Bars & Grills, Severn
- Basement Waterproofing - Waterproofing Contractors, Severn - Foundation & Concrete Waterproofing
- Beauty Salons, Severn
- Beverage Dispenser Supplies & Equipment , Severn - Beverage Dispensing
- Bible Church, Severn
- Bicycle Rentals, Severn - Bike Rental
- Bicycle Repair & Service, Severn - Bike Repair Shops
- Bonds Surety & Fidelity, Severn
- Boxing Clubs & Instruction, Severn
- Brake Service & Repair, Severn - Brake Pads
- Builders & Contractors, Severn
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- Builders & Contractors - More, Severn
- Builders Hardware Stores, Severn
- Building & Home Inspection, Severn - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Severn - Construction Management & Consulting
- Building Hardware & Materials, Severn
- Building Materials, Severn - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Severn
- Building Materials Commercial & Industrial, Severn
- Burglar Alarm Systems, Severn
- Bus Rental & Charter Bus Service, Severn
- Business & Professional Associations, Severn
- Business Legal Services, Severn
- Business Management Consultants, Severn
- Business Services, Severn
- Business, Vocational & Technical, Severn
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