- Safe & Vault, Wyandanch
- Safety & Security Systems & Consultants, Wyandanch
- Sandblasting, Wyandanch - General Contractors
- Sandwich Shop Restaurants, Wyandanch
- Scrap & Waste Materials, Wyandanch
- Security & Surveillance System & Equipment, Wyandanch
- Security Management Consultants, Wyandanch
- Security Services, Wyandanch
- Sheet Metal Contractors, Wyandanch - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Wyandanch
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- Shoe Stores, Wyandanch - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Wyandanch
- Snack Foods, Wyandanch
- Social Clubs & Organizations, Wyandanch
- Social Services & Welfare, Wyandanch
- Specialty Stores, Wyandanch
- Sporting & Recreational Camps, Wyandanch
- Stone Setting Contractors, Wyandanch
- Stoves, Ovens, Ranges & Cooktops, Wyandanch
- Surgical & Medical Instruments Manufacturers, Wyandanch
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