- Warehousing & Storage, West Islip - Warehouse Services
- Waste & Refuse Services & Sites, West Islip
- Water Transportation, Except Passenger, West Islip
- Water Treatment & Conditioning Systems, Equipment & Supplies, West Islip - Water Softener Companies
- Water, Sewer & Utility Line Contractors, West Islip - Installation & Repair Services
- Wedding & Bridal Services, West Islip
- Wedding Ceremony Locations & Wedding Venues, West Islip
- Wedding Gown Cleaning, West Islip
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- Wedding Gown Preservation, West Islip
- Wedding Planning & Consultants, West Islip
- Wildlife Rescue & Rehabilitation, West Islip
- Wildlife Services, West Islip
- Wireless & Cellular Communications Equipment & Supplies, West Islip
- Women s Clothing Stores, West Islip - Clothes & Accessories
- Women's Fashion Accessories, West Islip - Handbags, Wallets, Scarves, Belts, Necklace, Bracelets, Earrings and more
- Wrecking & Demolition Contractors, West Islip - House & Building Demolition Companies
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