- Sandwich Shop Restaurants, Shelley
- Satellite Descrambling & Programming Service, Shelley
- Satellite TV Service, Shelley
- Savings Banks, Shelley
- Secondary Schools, Shelley
- Security Brokers & Dealers, Shelley
- Senior Citizens Service & Health Organizations, Shelley
- Septic Tank Installation & Repair, Shelley - Septic Systems
- Septic Tank Pumping & Cleaning, Shelley - Septic Systems
- Septic Tanks & Septic Systems Contractors, Shelley - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Service Industry Manufacturers Machinery, Shelley
- Sewer & Drain Cleaning & Repair, Shelley - Drain Cleaner & Installation Services
- Sewer Companies, Shelley
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- Sewer Construction Contractors, Shelley - Sewer Line, Pipe Installation & Repair Services
- Shopping & Shopping Services, Shelley
- Snowmobile Repair, Parts, Sales & Service, Shelley
- Social Services & Welfare, Shelley
- Specialty Stores, Shelley
- Sporting Goods Equipment Rental, Shelley
- Sporting Goods Stores, Shelley
- Stock & Bond Brokers & Dealers, Shelley
- Stocks & Bond Brokers, Shelley
- Structural Engineer, Shelley
- Surveyor Services, Shelley - Surveying Service
- Swimming Pools, Shelley
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