- Salvage Yards, Junk Yards & Wrecker Service, Hartford
- Sandwich Shop Restaurants, Hartford
- Savings Banks, Hartford
- Secondary Schools, Hartford
- Security Alarm Systems - Home & Business, Hartford
- Security Control Systems & Monitoring, Hartford - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Hartford
- Senior Citizens Service & Health Organizations, Hartford
- Sewage Plant Operation, Hartford
- Sewer Cleaning Equipment & Supplies, Hartford - Sewer Builders
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