- Sandwich Shop Restaurants, Alexandria Bay
- Satellite & Cable TV Equipment & Systems, Alexandria Bay
- Satellite Descrambling & Programming Service, Alexandria Bay
- Satellite Dish Antennas & Equipment Dealers, Alexandria Bay
- Satellite TV Service, Alexandria Bay
- Sawmill, Paper & Woodworking Supplies, Machinery & Equipment, Alexandria Bay
- Seafood Restaurants, Alexandria Bay
- Security & Surveillance System & Equipment, Alexandria Bay
- Security Alarm Systems - Home & Business, Alexandria Bay
- Security Control Systems & Monitoring, Alexandria Bay - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Alexandria Bay
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- Shopping & Shopping Services, Alexandria Bay
- Small Business & Office Equipment Repair Services, Alexandria Bay
- Social Services & Welfare, Alexandria Bay
- Specialty Stores, Alexandria Bay
- Sporting & Recreational Camps, Alexandria Bay
- Sporting Goods Stores, Alexandria Bay
- State Government, Alexandria Bay
- State Parks, Alexandria Bay
- Steak House Restaurants, Alexandria Bay
- Submarine Sandwich Restaurants, Alexandria Bay
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