- Safety & Security Systems & Consultants, New London
- Sawmill & Planing Mills, New London
- Sawmill Supplies & Equipment Repair, New London
- Scrap & Waste Materials, New London
- Secondary Schools, New London
- Septic Tanks & Systems, New London - Wholesale, Dealers & Suppliers
- Sewer & Drain Cleaning & Repair, New London - Drain Cleaner & Installation Services
- Shopping & Shopping Services, New London
- Signs, New London
- Ski Shops - Equipment & Supplies Sales & Rental, New London
- Ski, Snowboard & Snowmobile Shop - Equipment Rental & Services, New London
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- Social Clubs & Organizations, New London
- Social Services & Welfare, New London
- Societies & Foundation Associations, New London
- Special Dies Tools Jigs & Fixtures Manufacturers, New London
- Specialty Stores, New London
- Sporting Goods Manufacturers, New London
- Sporting Goods Stores, New London
- State Government, New London
- Substance Abuse Clinics, New London - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Swimming Pools & Equipment Manufacturers, New London
- Swimming Pools Supplies, Equipment & Accessories, New London
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