- Sales & Marketing Consultant, Duxbury
- Sandwich Shop Restaurants, Duxbury
- Satellite & Cable TV Equipment & Systems, Duxbury
- Sawmill, Paper & Woodworking Supplies, Machinery & Equipment, Duxbury
- School Bus Transportation, Duxbury
- School Furniture & Equipment, Duxbury
- Scrap & Waste Materials, Duxbury
- Seafood Restaurants, Duxbury
- Secondary Schools, Duxbury
- Secretarial & Court Reporting Services, Duxbury
- Security Alarm Systems - Home & Business, Duxbury
- Security Brokers & Dealers, Duxbury
- Security Control Systems & Monitoring, Duxbury - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Duxbury
- Septic Tank Pumping & Cleaning, Duxbury - Septic Systems
- Septic Tanks & Systems, Duxbury - Wholesale, Dealers & Suppliers
- Septic Tanks & Systems Contractors & Designers, Duxbury
- Sewing & Yarn Stores & Supplies, Duxbury
- Shopping & Shopping Services, Duxbury
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- Siding Contractors, Duxbury - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Duxbury
- Snacks & Desserts, Duxbury
- Social Clubs & Organizations, Duxbury
- Social Services & Welfare, Duxbury
- Special Interest Schools Or Instruction, Duxbury
- Special Needs Transportation, Duxbury
- Specialty Animal Services, Duxbury
- Specialty Stores, Duxbury
- Sporting & Recreational Camps, Duxbury
- Sporting Goods Stores, Duxbury
- Stadiums, Arenas, Coliseums & Athletic Fields, Duxbury
- Staffing & Support Services, Duxbury
- State Government, Duxbury
- Steel & Metal Goods, Duxbury - Steel Distributors
- Stock & Bond Brokers & Dealers, Duxbury
- Stocks & Bond Brokers, Duxbury
- Storage & Closet Equipment Supplies & Materials, Duxbury
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