- Safe & Vault, Syosset
- Safety Equipment & Supplies, Syosset
- Sales & Marketing Consultant, Syosset
- Sand Gravel & Aggregate, Syosset
- Sandwich Shop Restaurants, Syosset
- Savings Banks, Syosset
- School - Catholic, Syosset
- School - Christian, Syosset
- Scientific Equipment & Services, Syosset
- Scientific Equipment & Supplies, Syosset
- Screening & Preventative Health Services, Syosset
- Seafood Restaurants, Syosset
- Secondary Schools, Syosset
- Security & Surveillance System & Equipment, Syosset
- Security Brokers & Dealers, Syosset
- Security Guard & Patrol Service, Syosset - Bodyguard, Guard Dogs, Etc
- Security Services, Syosset
- Self Defense Programs, Syosset
- Septic & Cesspool Building & Service, Syosset
- Septic Tank Pumping & Cleaning, Syosset - Septic Systems
- Sewer & Drain Cleaning & Repair, Syosset - Drain Cleaner & Installation Services
- Sewer Construction Contractors, Syosset - Sewer Line, Pipe Installation & Repair Services
- Sewing & Yarn Stores & Supplies, Syosset
- Shoe Dyers, Syosset
- Shoe Repair Shops, Syosset
- Shoe Stores, Syosset - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Syosset
- Siding Contractors, Syosset - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Syosset
- Skating Rink & Hockey Operation Services, Syosset
- Small Appliances, Syosset
- Smoothie Restaurants, Syosset
- Snacks & Desserts, Syosset
- Snow Removal Services, Syosset - Snow Plow Service
- Social Clubs & Organizations, Syosset
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- Social Services & Welfare, Syosset
- Social Workers & Services, Syosset
- Societies & Foundation Associations, Syosset
- Special Education & Care, Syosset
- Special Events Photographers, Syosset
- Special Interest Schools Or Instruction, Syosset
- Specialty Goods Storage, Syosset
- Specialty Rental Services, Syosset
- Specialty Stores, Syosset
- Speech & Hearing Specialists, Syosset
- Speech Pathologists, Syosset - Speech & Language Therapy
- Sporting & Recreational Camps, Syosset
- Sporting Goods Stores, Syosset
- Sports & Recreational Services, Syosset
- Sportswear Manufacturers, Syosset
- Sportswear Wholesale, Syosset
- Staffing & Support Services, Syosset
- Stamp Collecting & Coin Dealers , Syosset
- Steak House Restaurants, Syosset
- Steel & Metal Goods, Syosset - Steel Distributors
- Stock & Bond Brokers & Dealers, Syosset
- Stocks & Bond Brokers, Syosset
- Stone And Glass Products, Syosset
- Substance Abuse Clinics, Syosset - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Surgical Supplies & Equipment, Syosset
- Surgical Supplies, Instruments, Tools & Equipment, Syosset
- Surveyor Services, Syosset - Surveying Service
- Sushi Restaurants, Syosset
- Swimming Pool Covers & Enclosures, Syosset
- Swimming Pool, Sauna & Spa Contractors, Syosset
- Swimming Pools Contractors, Syosset - Install Inground - Above Ground Pools
- Swimming Pools Supplies, Equipment & Accessories, Syosset
- Swimwear & Accessories Shops, Syosset - Water Sports Equipment
- Synagogues & Temples, Syosset
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