- Safe & Vault, Upland
- Safe, Lock & Key Repair Services, Upland - Safes & Vaults Opening & Repair
- Safety & Security Systems & Consultants, Upland
- Safety Equipment & Supplies, Upland
- Safety Training Schools, Upland
- Sales & Marketing Consultant, Upland
- Sales Promotion & Counseling Service, Upland
- Sandblasting, Upland - General Contractors
- Sandwich Shop Restaurants, Upland
- Satellite & Cable TV Equipment & Systems Repair & Service, Upland
- Satellite Dish Antennas & Equipment Dealers, Upland
- Satellite TV Service, Upland
- Savings & Loan Associations, Upland
- Savings Banks, Upland
- Sawmill, Paper & Woodworking Supplies, Machinery & Equipment, Upland
- Scales Public, Upland
- School Bus Transportation Service, Upland
- Schools Security Training, Upland
- Scientific & Laboratory Equipment & Instruments, Upland
- Scientific Services, Upland
- Scrapbooks & Scrapbook Supplies, Upland
- Screen Printing, Upland
- Screens Doors & Windows, Upland
- Seafood Restaurants, Upland
- Seals, Upland - Hermetic, Hydraulic, Mechanical, Metal, Oil, Grease, etc
- Seals O Ring, Upland
- Secondary Schools, Upland
- Secretarial & Court Reporting Services, Upland
- Security & Commodity Exchanges, Upland
- Security & Surveillance System & Equipment, Upland
- Security Alarm Systems - Home & Business, Upland
- Security Brokers & Dealers, Upland
- Security Consultants, Upland
- Security Control Systems & Monitoring, Upland - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Guard & Patrol Service, Upland - Bodyguard, Guard Dogs, Etc
- Security Investigative Services, Upland
- Security Services, Upland
- Senior Citizens Service & Health Organizations, Upland
- Service Establishment Supplies & Equipment, Upland
- Sewer & Drain Cleaning & Repair, Upland - Drain Cleaner & Installation Services
- Sewing & Yarn Stores & Supplies, Upland
- Sewing Machines, Equipment & Supplies, Upland
- Sheet Metal, Upland
- Sheet Metal Contractors, Upland - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Upland
- Sheet Metal Work - Aluminum, Tin, Stainless Steel, etc, Upland - Sheet Metal Products
- Sheet Metal Work Precision Electronics Fabrication, Upland
- Shelving & Shelves, Upland - Metal, Steel, Wire & Glass Shelving Units & Storage - Wall Shelves
- Shelving Equipment, Upland
- Shirts & T-Shirts, Upland
- Shoe Dyers, Upland
- Shoe Repair Shops, Upland
- Shoe Store - More, Upland
- Shoe Stores, Upland - Mens, Womens & Kids Shoes
- Shooting & Target Ranges, Upland
- Shopping & Shopping Services, Upland
- Short Term Business Credit Institutions, Upland
- Shutters - Interior & Exterior, Upland - Wood, Vinyl, Window, Plantation Shutters, etc
- Sign Hanging & Installation Service, Upland - Signs Erectors & Hangers
- Sign Language - Interpreters, Upland
- Signs, Upland
- Signs & Advertising Specialties Manufacturers, Upland
- Site Planners, Upland
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- Skateboards & Equipment Shops, Upland - Skateboarding Supplies
- Skin Care & Cosmetology Salons, Upland
- Skin Care Products & Treatments, Upland
- Small Appliances, Upland
- Smog Check, Brake & Lamp Inspection & Repair, Upland
- Smoking Cessation Treatment Centers & Information Services, Upland
- Snacks & Desserts, Upland
- Soccer Equipment & Supplies, Upland
- Social Clubs & Organizations, Upland
- Social Services & Welfare, Upland
- Societies & Foundation Associations, Upland
- Solar Energy Companies - Contractors, Upland - Solar Panel Installation - Solar Power Systems
- Soup & Salad Restaurants, Upland
- South American Restaurants, Upland
- Special Dies Tools Jigs & Fixtures Manufacturers, Upland
- Special Events & Party Supply Rental, Upland
- Special Events Photographers, Upland
- Special Interest Schools Or Instruction, Upland
- Speciality Food Stores, Upland
- Specialty Animal Services, Upland
- Specialty Communication Companies & Services, Upland
- Specialty Stores, Upland
- Speech & Hearing Specialists, Upland
- Sporting Goods Equipment Rental, Upland
- Sporting Goods Stores, Upland
- Sports Bars & Lounges, Upland
- Sports Clubs, Upland
- Sportswear Clothing Stores, Upland - Sports Clothes
- Spraying Booths & Equipment, Upland
- Sprinkler Alarm Systems, Upland - Fire Sprinkler Systems
- Sprinkler System Contractors, Upland - Garden & Lawn Sprinkler System Installation & Repair
- Staffing & Support Services, Upland
- Stairs & Railings Contractors, Upland - Metal & Wood Stairs, Spiral Staircase & Stair Railing - Installation & Repair
- Stairs, Balcony, Terrace & Steeple Contractors, Upland
- Stamp Collecting & Coin Dealers , Upland
- State Government, Upland
- Stationery & Office Supplies, Upland
- Stationery Manufacturers, Upland
- Steak House Restaurants, Upland
- Steel & Metal Goods, Upland - Steel Distributors
- Steel Manufacturers, Upland
- Stitching Services, Upland
- Stock & Bond Brokers & Dealers, Upland
- Stocks & Bond Brokers, Upland
- Storage & Closet Equipment Supplies & Materials, Upland
- Store Fixtures, Upland
- Store Fixtures & Display Equipment, Upland
- Submarine Sandwich Restaurants, Upland
- Substance Abuse Clinics, Upland - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Substance Abuse Outpatient Clinics, Upland
- Surgical Hospitals, Upland - Surgical Centers
- Surgical Supplies & Equipment, Upland
- Surgical Supplies, Instruments, Tools & Equipment, Upland
- Surplus & Salvage Merchandise, Upland
- Surveyor Services, Upland - Surveying Service
- Sushi Restaurants, Upland
- Sweepers & Scrubbers Industrial, Upland - Sweeping Service
- Swimming, Upland
- Swimming Pool, Sauna & Spa Contractors, Upland
- Swimming Pools Contractors, Upland - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Upland
- Swimming Pools Supplies, Equipment & Accessories, Upland
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