- Banks, Prosser
- Baptist Churches, Prosser
- Barbecue Restaurants, Prosser
- Bars, Prosser
- Battery, Prosser - Retail Batteries Stores
- Battery Storage, Prosser
- Beauty Salons, Prosser
- Beer & Wine Stores, Prosser
- Beer Taverns, Prosser
- Beverage Stores, Prosser
- Bicycle Shops, Prosser - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Boiler Repair, Cleaning & Installation, Prosser
- Bonds, Prosser
- Bookkeeping Services Licensed, Prosser
- Bookkeeping Systems & Services, Prosser
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- Brake Service & Repair, Prosser - Brake Pads
- Breakfast Restaurants, Prosser
- Brew Pubs, Prosser
- Builders & Contractors, Prosser
- Builders & Contractors - More, Prosser
- Building & Home Inspection, Prosser - Real Estate, Building, Land & House Inspection Service
- Building Hardware & Materials, Prosser
- Building Materials & Supplies, Prosser
- Burglar Alarm Systems, Prosser
- Bus Lines, Prosser - Bus Transportation
- Business & Professional Associations, Prosser
- Business Legal Services, Prosser
- Business Management Consultants, Prosser
- Business Services, Prosser
- Butcher Shops, Prosser
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