- Safety & Security Systems & Consultants, Bellport
- Sales & Marketing Consultant, Bellport
- Scientific & Laboratory Equipment & Instruments, Bellport
- Scientific Equipment & Services, Bellport
- Scientific Services, Bellport
- Scrap & Waste Materials, Bellport
- Seafood Restaurants, Bellport
- Secondary Schools, Bellport
- Secretarial & Court Reporting Services, Bellport
- Security & Surveillance System & Equipment, Bellport
- Security Brokers & Dealers, Bellport
- Security Management Consultants, Bellport
- Security Services, Bellport
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- Septic & Cesspool Building & Service, Bellport
- Ship & Boat Building & Repairing, Bellport
- Shoe Stores, Bellport - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Bellport
- Soccer Clubs, Bellport
- Social Services & Welfare, Bellport
- Social Workers & Services, Bellport
- Societies & Foundation Associations, Bellport
- Special Interest Schools Or Instruction, Bellport
- Specialty Stores, Bellport
- Sports Clubs, Bellport
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Bellport
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