- Salvation Army, Port Credit
- Seafood Restaurants, Port Credit
- Secretarial & Court Reporting Services, Port Credit
- Security Alarm Systems - Home & Business, Port Credit
- Security Control Systems & Monitoring, Port Credit - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Port Credit
- Sheet Metal Contractors, Port Credit - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Port Credit
- Shoe Stores, Port Credit - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Port Credit
- Siding Contractors, Port Credit - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Port Credit
- Snow Removal Services, Port Credit - Snow Plow Service
- Social Clubs & Organizations, Port Credit
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- Social Services & Welfare, Port Credit
- Societies & Foundation Associations, Port Credit
- Special Education & Care, Port Credit
- Special Interest Schools Or Instruction, Port Credit
- Specialty Animal Services, Port Credit
- Specialty Goods Storage, Port Credit
- Specialty Stores, Port Credit
- Sporting Goods Stores, Port Credit
- Staffing & Support Services, Port Credit
- Stairs & Railings Contractors, Port Credit - Metal & Wood Stairs, Spiral Staircase & Stair Railing - Installation & Repair
- Stairs, Balcony, Terrace & Steeple Contractors, Port Credit
- Stoves & Furnace Equipment, Port Credit - Fittings & Repair Parts
- Stress Management & Counseling, Port Credit
- Sushi Restaurants, Port Credit
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