- Sails, Amityville
- Sales & Marketing Consultant, Amityville
- Sales Promotion & Counseling Service, Amityville
- Sales Promotion Service, Amityville
- Salvage Yards, Junk Yards & Wrecker Service, Amityville
- Sandwich Shop Restaurants, Amityville
- Satellite & Cable TV Equipment & Systems, Amityville
- Satellite Dish Antennas & Equipment Dealers, Amityville
- Satellite TV Service, Amityville
- Sawmill, Paper & Woodworking Supplies, Machinery & Equipment, Amityville
- Scaffolding & Aerial Lifts, Amityville
- School - Catholic, Amityville
- School - Christian, Amityville
- School Bus Transportation Service, Amityville
- Scientific & Laboratory Equipment & Instruments, Amityville
- Scientific Equipment & Services, Amityville
- Scientific Services, Amityville
- Scrap & Waste Materials, Amityville
- Screen Printing, Amityville
- Seafood Restaurants, Amityville
- Secondary Schools, Amityville
- Secretarial & Court Reporting Services, Amityville
- Security & Commodity Brokers, Amityville
- Security & Surveillance System & Equipment, Amityville
- Security Alarm Systems - Home & Business, Amityville
- Security Brokers & Dealers, Amityville
- Security Control Systems & Monitoring, Amityville - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Amityville
- Senior Citizens Service & Health Organizations, Amityville
- Septic & Cesspool Building & Service, Amityville
- Septic Tank Installation & Repair, Amityville - Septic Systems
- Septic Tank Pumping & Cleaning, Amityville - Septic Systems
- Septic Tanks & Septic Systems Contractors, Amityville - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Sewer & Drain Cleaning & Repair, Amityville - Drain Cleaner & Installation Services
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- Sewer Construction Contractors, Amityville - Sewer Line, Pipe Installation & Repair Services
- Sewing & Yarn Stores & Supplies, Amityville
- Sewing Machine Repair & Service, Amityville
- Sheet Metal, Amityville
- Shopping & Shopping Services, Amityville
- Signs, Amityville
- Small Appliances, Amityville
- Snacks & Desserts, Amityville
- Social & Human Services Autism Services, Amityville
- Social Clubs & Organizations, Amityville
- Social Services & Welfare, Amityville
- Social Workers & Services, Amityville
- Societies & Foundation Associations, Amityville
- Special Events & Party Supply Rental, Amityville
- Special Interest Schools Or Instruction, Amityville
- Specialty Stores, Amityville
- Speech & Hearing Specialists, Amityville
- Sporting Goods Manufacturers, Amityville
- Sporting Goods Stores, Amityville
- Sports Promoters & Managers, Amityville
- Sports Promotions & Special Events, Amityville
- Sportswear Clothing Stores, Amityville - Sports Clothes
- Sprinkler System Contractors, Amityville - Garden & Lawn Sprinkler System Installation & Repair
- Staffing & Support Services, Amityville
- Stationery & Office Supplies, Amityville
- Steel & Metal Goods, Amityville - Steel Distributors
- Steel Detailers, Amityville
- Steel Erection Contractors, Amityville - Steel Erectors
- Steel Work Contractors, Amityville
- Storage & Closet Equipment Supplies & Materials, Amityville
- Store Fronts, Amityville - Storefront
- Surveyor Services, Amityville - Surveying Service
- Sushi Restaurants, Amityville
- Swimming Pools, Amityville
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