- Safe & Vault, Oakville
- Safety Equipment & Supplies, Oakville
- Safety Training Schools, Oakville
- Sailing Instructions, Oakville
- Sales & Marketing Consultant, Oakville
- Sand Gravel & Aggregate, Oakville
- Sandwich Shop Restaurants, Oakville
- Satellite & Cable TV Equipment & Systems Repair & Service, Oakville
- Sawmill, Paper & Woodworking Supplies, Machinery & Equipment, Oakville
- Scaffolding & Aerial Lifts, Oakville
- Scales Retail, Oakville
- Schools Montessori Instruction, Oakville
- Scientific & Laboratory Equipment & Instruments, Oakville
- Scientific & Research Professionals, Oakville
- Scientific & Technical Consultants, Oakville
- Scientific Equipment, Oakville
- Scientific Services, Oakville
- Scoreboard Signs, Oakville
- Scrap & Waste Machinery, Oakville
- Scrap & Waste Materials, Oakville
- Scrapbooks & Scrapbook Supplies, Oakville
- Screen Printing, Oakville
- Screens Doors & Windows, Oakville
- Seafood Restaurants, Oakville
- Seals, Oakville - Hermetic, Hydraulic, Mechanical, Metal, Oil, Grease, etc
- Seals O Ring, Oakville
- Secondary Schools, Oakville
- Secretarial & Court Reporting Services, Oakville
- Security & Commodity Brokers, Oakville
- Security Alarm Systems - Home & Business, Oakville
- Security Brokers & Dealers, Oakville
- Security Control Systems & Monitoring, Oakville - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Guard & Patrol Service, Oakville - Bodyguard, Guard Dogs, Etc
- Security Investigative Services, Oakville
- Security Services, Oakville
- Semiconductors & Equipment, Oakville
- Senior Citizens Housing, Oakville
- Senior Citizens Information & Services, Oakville
- Senior Citizens Service & Health Organizations, Oakville
- Service & Gas Station Equipment & Services, Oakville
- Service Establishment Supplies & Equipment, Oakville
- Sewer Construction Contractors, Oakville - Sewer Line, Pipe Installation & Repair Services
- Sewing & Yarn Stores & Supplies, Oakville
- Sewing Machine Repair & Service, Oakville
- Sewing Machines, Equipment & Supplies, Oakville
- Sex Counseling & Therapy, Oakville
- Sheet Metal Contractors, Oakville - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Oakville
- Sheet Metal Work Equipment & Supplies, Oakville
- Shelving & Shelves, Oakville - Metal, Steel, Wire & Glass Shelving Units & Storage - Wall Shelves
- Shelving Equipment, Oakville
- Ship & Boat Building & Repairing, Oakville
- Shipping Companies, Oakville
- Shipping Service, Oakville
- Shoe Repair & Shoeshine Parlors, Oakville
- Shoe Repair Shops, Oakville
- Shoe Store - More, Oakville
- Shoe Stores, Oakville - Mens, Womens & Kids Shoes
- Shoes Orthopedic Technicians, Oakville
- Shooting & Target Ranges, Oakville
- Shopping & Shopping Services, Oakville
- Short Term Business Credit Institutions, Oakville
- Shutters - Interior & Exterior, Oakville - Wood, Vinyl, Window, Plantation Shutters, etc
- Siding Contractors, Oakville - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Sightseeing Tours, Oakville
- Sign Equipment & Supplies, Oakville
- Signs, Oakville
- Skateboards & Equipment Shops, Oakville - Skateboarding Supplies
- Skating Rink & Hockey Operation Services, Oakville
- Skating Supplies, Oakville - Ice, Inline, Speed, Figure & Roller Skates
- Skin Care & Cosmetology Salons, Oakville
- Skin Care Products & Treatments, Oakville
- Skylights, Oakville - Skylight Shades, Blinds, Covers & More
- Sleds, Snowboards & Snowshoes Shops, Oakville - Snow Sleds, Toboggans, Helmets, Boots, Goggles, Clothing, Gear & More
- Sleep Disorders Treatment & Information Centers, Oakville
- Small Appliances, Oakville
- Smoking Cessation Treatment Centers & Information Services, Oakville
- Snacks & Desserts, Oakville
- Snow Making Equipment, Oakville
- Snow Melting Equipment, Oakville
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- Snow Removal Services, Oakville - Snow Plow Service
- Soccer Clubs, Oakville
- Social Clubs & Organizations, Oakville
- Social Services & Welfare, Oakville
- Societies & Foundation Associations, Oakville
- Sod & Sodding Service, Oakville
- Solar Equipment, Oakville
- Solariums & Garden Rooms, Oakville
- Sound Systems, Microphones & Equipment, Oakville
- Soup & Salad Restaurants, Oakville
- Special Coatings, Oakville - Protective Coatings
- Special Dies Tools Jigs & Fixtures Manufacturers, Oakville
- Special Education & Care, Oakville
- Special Events & Party Supply Rental, Oakville
- Special Events Photographers, Oakville
- Special Interest Schools Or Instruction, Oakville
- Speciality Food Stores, Oakville
- Specialty Animal Services, Oakville
- Specialty Goods Storage, Oakville
- Specialty Stores, Oakville
- Speech & Hearing Specialists, Oakville
- Speech Pathologists, Oakville - Speech & Language Therapy
- Sporting Goods Equipment Rental, Oakville
- Sporting Goods Stores, Oakville
- Sports & Recreational Services, Oakville
- Sports Bars & Lounges, Oakville
- Sports Clubs, Oakville
- Sports Medicine, Oakville - Doctors, Physicians & Surgeons
- Sports Promoters & Managers, Oakville
- Sports Promotions & Special Events, Oakville
- Sportswear Clothing Stores, Oakville - Sports Clothes
- Sportswear Manufacturers, Oakville
- Sportswear Wholesale, Oakville
- Spraying Booths & Equipment, Oakville
- Springs Automotive, Oakville
- Staffing & Support Services, Oakville
- Stamp Collecting & Coin Dealers , Oakville
- Steak House Restaurants, Oakville
- Steel & Metal Goods, Oakville - Steel Distributors
- Steel Fabrication & Processing Equipment, Oakville
- Steel Manufacturers, Oakville
- Stereo, Audio & Video Equipment Dealers & Stores, Oakville
- Stock & Bond Brokers & Dealers, Oakville
- Stocks & Bond Brokers, Oakville
- Stone, Oakville
- Stone And Glass Products, Oakville
- Stone Massage, Oakville
- Stone Setting Contractors, Oakville
- Storage & Closet Equipment Supplies & Materials, Oakville
- Storage Systems & Closet Organizers, Oakville
- Store Fixtures, Oakville
- Store Fixtures & Display Equipment, Oakville
- Store Fronts, Oakville - Storefront
- Stoves & Furnace Equipment, Oakville - Fittings & Repair Parts
- Stoves, Ovens, Ranges & Cooktops, Oakville
- Street Cleaning Services, Oakville
- Stress Management & Counseling, Oakville
- Stretch & Shrink Film, Oakville
- Structural Engineer, Oakville
- Structural Steel Erection, Oakville
- Stucco Siding Contractors, Oakville - Stucco Repair & Installation
- Stucco Siding, Granite & Grouting Contractors, Oakville
- Submarine Sandwich Restaurants, Oakville
- Substance Abuse Outpatient Clinics, Oakville
- Suicide Prevention Service & Counseling, Oakville
- Surgical Supplies & Equipment, Oakville
- Surgical Supplies, Instruments, Tools & Equipment, Oakville
- Surplus & Salvage Merchandise, Oakville
- Surveyor Services, Oakville - Surveying Service
- Surveyors, Oakville
- Sushi Restaurants, Oakville
- Swimming Lessons & Classes, Oakville
- Swimming Pool Covers & Enclosures, Oakville
- Swimming Pool, Sauna & Spa Contractors, Oakville
- Swimming Pools Contractors, Oakville - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Oakville
- Swimming Pools Supplies, Equipment & Accessories, Oakville
- Swimwear & Accessories Shops, Oakville - Water Sports Equipment
- Synagogues & Temples, Oakville
- Synthetic Resins & Rubber, Oakville
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