- Sandwich Shop Restaurants, West Barnstable
- Scientific Equipment & Services, West Barnstable
- Scientific Services, West Barnstable
- Screen Printing, West Barnstable
- Security Alarm Systems - Home & Business, West Barnstable
- Security Control Systems & Monitoring, West Barnstable - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, West Barnstable
- Sewing & Yarn Stores & Supplies, West Barnstable
- Shopping & Shopping Services, West Barnstable
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- Siding Contractors, West Barnstable - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Social Services & Welfare, West Barnstable
- Special Interest Schools Or Instruction, West Barnstable
- Specialty Animal Services, West Barnstable
- Specialty Stores, West Barnstable
- Sporting & Recreational Camps, West Barnstable
- Staffing & Support Services, West Barnstable
- Stair Resurfacing, West Barnstable
- Stairs, Balcony, Terrace & Steeple Contractors, West Barnstable
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