- Sales & Marketing Consultant, East Aurora
- Sandwich Shop Restaurants, East Aurora
- School Bus Transportation Service, East Aurora
- Secondary Schools, East Aurora
- Security & Surveillance System & Equipment, East Aurora
- Security Brokers & Dealers, East Aurora
- Security Investigative Services, East Aurora
- Security Services, East Aurora
- Sedation Dentistry, East Aurora
- Senior Citizens Service & Health Organizations, East Aurora
- Service Establishment Supplies & Equipment, East Aurora
- Sewer & Drain Cleaning & Repair, East Aurora - Drain Cleaner & Installation Services
- Sewer Construction Contractors, East Aurora - Sewer Line, Pipe Installation & Repair Services
- Sewing & Yarn Stores & Supplies, East Aurora
- Sewing Machines, Equipment & Supplies, East Aurora
- Sheet Metal Contractors, East Aurora - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, East Aurora
- Shoe Store - More, East Aurora
- Shoe Stores, East Aurora - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, East Aurora
- Signs, East Aurora
- Ski Shops - Equipment & Supplies Sales & Rental, East Aurora
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- Ski, Snowboard & Snowmobile Shop - Equipment Rental & Services, East Aurora
- Small Appliances, East Aurora
- Snacks & Desserts, East Aurora
- Snowmobile Dealers, East Aurora - Parts, Gear, Clothing & Accessories
- Social Clubs & Organizations, East Aurora
- Social Services & Welfare, East Aurora
- Social Workers & Services, East Aurora
- Societies & Foundation Associations, East Aurora
- Special Interest Schools Or Instruction, East Aurora
- Speciality Food Stores, East Aurora
- Specialty Animal Services, East Aurora
- Specialty Stores, East Aurora
- Speech & Hearing Specialists, East Aurora
- Sporting & Recreational Camps, East Aurora
- Sporting Goods Stores, East Aurora
- Sprinkler Alarm Systems, East Aurora - Fire Sprinkler Systems
- Staffing & Support Services, East Aurora
- Steel & Metal Goods, East Aurora - Steel Distributors
- Stock & Bond Brokers & Dealers, East Aurora
- Stocks & Bond Brokers, East Aurora
- Submarine Sandwich Restaurants, East Aurora
- Surveyor Services, East Aurora - Surveying Service
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