- Savings Banks, Croydon
- School - Catholic, Croydon
- School - Christian, Croydon
- Schools For The Physically Challenged, Croydon
- Scrap & Waste Materials, Croydon
- Screen Printing, Croydon
- Security Alarm Systems - Home & Business, Croydon
- Security Control Systems & Monitoring, Croydon - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Croydon
- Service & Gas Station Equipment & Services, Croydon
- Service Establishment Supplies & Equipment, Croydon
- Sheet Metal Contractors, Croydon - Sheet Metal Fabrication
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- Sheet Metal Fabricators & Ductwork Contractors, Croydon
- Shopping & Shopping Services, Croydon
- Signs, Croydon
- Snacks & Desserts, Croydon
- Snow Removal Services, Croydon - Snow Plow Service
- Social Services & Welfare, Croydon
- Special Dies Tools Jigs & Fixtures Manufacturers, Croydon
- Special Education & Care, Croydon
- Specialty Stores, Croydon
- Sporting Goods Stores, Croydon
- Sprinkler Alarm Systems, Croydon - Fire Sprinkler Systems
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