- Safety Equipment & Supplies, Portland
- Sales & Marketing Consultant, Portland
- Salvation Army, Portland
- Sandwich Shop Restaurants, Portland
- Satellite Descrambling & Programming Service, Portland
- Satellite Dish Antennas & Equipment Dealers, Portland
- Satellite TV Service, Portland
- Savings & Loan Associations, Portland
- Savings Banks, Portland
- Sawmill, Paper & Woodworking Supplies, Machinery & Equipment, Portland
- Scaffolding & Aerial Lifts, Portland
- Scales Retail, Portland
- Scientific Equipment & Services, Portland
- Scientific Services, Portland
- Scrap & Waste Machinery, Portland
- Scrap & Waste Materials, Portland
- Screen Printing, Portland
- Seafood Restaurants, Portland
- Sealcoating, Portland - Asphalt Sealcoating & Paving
- Secondary Schools, Portland
- Secretarial & Court Reporting Services, Portland
- Security & Commodity Brokers, Portland
- Security & Surveillance System & Equipment, Portland
- Security Alarm Systems - Home & Business, Portland
- Security Brokers & Dealers, Portland
- Security Control Systems & Monitoring, Portland - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Guard & Patrol Service, Portland - Bodyguard, Guard Dogs, Etc
- Security Investigative Services, Portland
- Security Services, Portland
- Self Defense Programs, Portland
- Senior Citizens Service & Health Organizations, Portland
- Septic Tank Pumping & Cleaning, Portland - Septic Systems
- Septic Tanks & Septic Systems Contractors, Portland - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Septic Tanks & Systems Inspection, Portland
- Service Establishment Supplies & Equipment, Portland
- Sewer & Drain Cleaning & Repair, Portland - Drain Cleaner & Installation Services
- Sewing & Yarn Stores & Supplies, Portland
- Sewing Machines, Equipment & Supplies, Portland
- Sheet Metal, Portland
- Sheet Metal Contractors, Portland - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Portland
- Shellfish Raising, Portland
- Ship & Yacht Broker & Agent, Portland
- Ship Chandlers, Portland
- Shipping Service, Portland
- Shirts & T-Shirts, Portland
- Shoe Repair Shops, Portland
- Shoe Store - More, Portland
- Shoe Stores, Portland - Mens, Womens & Kids Shoes
- Shooting & Target Ranges, Portland
- Shopping & Shopping Services, Portland
- Siding Contractors, Portland - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Siding Materials, Portland
- Sightseeing Tours, Portland
- Signs, Portland
- Skateboards & Equipment Shops, Portland - Skateboarding Supplies
- Skating Rink & Hockey Operation Services, Portland
- Skating Supplies, Portland - Ice, Inline, Speed, Figure & Roller Skates
- Ski Centers, Portland
- Ski Resorts, Portland
- Ski Shops - Equipment & Supplies Sales & Rental, Portland
- Ski, Snowboard & Snowmobile Shop - Equipment Rental & Services, Portland
- Skin Care & Cosmetology Salons, Portland
- Skin Care Products & Treatments, Portland
- Sleds, Snowboards & Snowshoes Shops, Portland - Snow Sleds, Toboggans, Helmets, Boots, Goggles, Clothing, Gear & More
- Small Appliances, Portland
- Smoker Cessation - Information & Referral Service, Portland
- Snack Foods, Portland
- Snacks & Desserts, Portland
- Soccer Clubs, Portland
- Social & Human Services Attention Deficit Disorder Services, Portland
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- Social Clubs & Organizations, Portland
- Social Security And Disability Attorneys & Lawyers, Portland
- Social Security And Disability Lawyers & Attorneys, Portland
- Social Security Counselors & Representatives, Portland
- Social Service Organizations Mental Health Services, Portland
- Social Service Organizations Volunteer Services, Portland
- Social Services & Welfare, Portland
- Social Workers & Services, Portland
- Societies & Foundation Associations, Portland
- Soda Fountain Shops, Portland
- Solar Equipment, Portland
- Sound Systems & Recording Equipment, Portland
- Sound Systems, Microphones & Equipment, Portland
- Special Events & Party Supply Rental, Portland
- Special Interest Schools Or Instruction, Portland
- Speciality Food Stores, Portland
- Specialty Animal Services, Portland
- Specialty Goods Storage, Portland
- Specialty Stores, Portland
- Speech & Hearing Specialists, Portland
- Speech Pathologists, Portland - Speech & Language Therapy
- Sporting & Recreational Camps, Portland
- Sporting Goods Equipment Rental, Portland
- Sporting Goods Stores, Portland
- Sports & Recreational Services, Portland
- Sports Bars & Lounges, Portland
- Sports Clubs, Portland
- Sports Medicine, Portland - Doctors, Physicians & Surgeons
- Sports Promoters & Managers, Portland
- Sports Promotions & Special Events, Portland
- Sportswear Clothing Stores, Portland - Sports Clothes
- Sportswear Manufacturers, Portland
- Springs Automotive, Portland
- Sprinkler Alarm Systems, Portland - Fire Sprinkler Systems
- Sprinkler System Contractors, Portland - Garden & Lawn Sprinkler System Installation & Repair
- Stadiums, Arenas, Coliseums & Athletic Fields, Portland
- Staffing & Support Services, Portland
- Stamp Collecting & Coin Dealers , Portland
- State Government, Portland
- Stationery & Office Supplies, Portland
- Stationery Manufacturers, Portland
- Steak House Restaurants, Portland
- Steamship Companies & Agencies, Portland
- Steel & Metal Goods, Portland - Steel Distributors
- Steel Manufacturers, Portland
- Stevedoring Contractors, Portland
- Stitching Services, Portland
- Stock & Bond Brokers & Dealers, Portland
- Stock Photographers, Portland
- Stocks & Bond Brokers, Portland
- Stone And Glass Products, Portland
- Storage & Closet Equipment Supplies & Materials, Portland
- Store Fixtures & Display Equipment, Portland
- Stove, Oven, Range & Cooktop Parts & Supplies, Portland
- Stoves & Furnace Equipment, Portland - Fittings & Repair Parts
- Structural Engineer, Portland
- Student Housing & Services, Portland
- Substance Abuse Clinics, Portland - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Substance Abuse Outpatient Clinics, Portland
- Sunrooms & Solarium Construction Contractors, Portland - Build & Repair
- Sunrooms, Greenhouses, Solariums & Atrium Builders, Portland - Build & Repair
- Support Services, Portland
- Surfboard & Windsurfing Equipment Shops, Portland
- Surveyor Services, Portland - Surveying Service
- Sweepers & Scrubbers Industrial, Portland - Sweeping Service
- Swimming Pool, Sauna & Spa Contractors, Portland
- Swimming Pools Contractors, Portland - Install Inground - Above Ground Pools
- Swimming Pools Supplies, Equipment & Accessories, Portland
- Swimwear & Accessories Shops, Portland - Water Sports Equipment
- Synagogues & Temples, Portland
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