- Sandwich Shop Restaurants, Stockton
- Security Alarm Systems - Home & Business, Stockton
- Security Brokers & Dealers, Stockton
- Security Control Systems & Monitoring, Stockton - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Stockton
- Seed & Grain Cleaning, Stockton
- Senior Citizens Service & Health Organizations, Stockton
- Sewing & Yarn Stores & Supplies, Stockton
- Ship & Boat Building & Repairing, Stockton
- Shopping & Shopping Services, Stockton
- Signs, Stockton
- Snack Foods, Stockton
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- Snacks & Desserts, Stockton
- Social Services & Welfare, Stockton
- Specialty Animal Services, Stockton
- Specialty Stores, Stockton
- Sporting Goods Stores, Stockton
- State Government, Stockton
- State Parks, Stockton
- Steel Manufacturers, Stockton
- Steel Mills & Blast Furnaces, Stockton
- Stocks & Bond Brokers, Stockton
- Stone & Rock Quarry, Stockton - Gravel Pit, Shale, Granite, Limestone, Crushed Rock, etc
- Submarine Sandwich Restaurants, Stockton
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