- Sales & Marketing Consultant, Portsmouth
- Sand Gravel & Aggregate, Portsmouth
- Sandblasting, Portsmouth - General Contractors
- Sandwich Shop Restaurants, Portsmouth
- Satellite Communication Downlinking & Uplinking, Portsmouth
- Satellite Dish Antennas & Equipment Dealers, Portsmouth
- Satellite TV Service, Portsmouth
- Savings Banks, Portsmouth
- School - Christian, Portsmouth
- Scrap & Waste Materials, Portsmouth
- Screen Printing, Portsmouth
- Seafood Restaurants, Portsmouth
- Search & Rescue, Portsmouth
- Secondary Schools, Portsmouth
- Secretarial & Court Reporting Services, Portsmouth
- Security & Surveillance System & Equipment, Portsmouth
- Security Alarm Systems - Home & Business, Portsmouth
- Security Brokers & Dealers, Portsmouth
- Security Control Systems & Monitoring, Portsmouth - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Guard & Patrol Service, Portsmouth - Bodyguard, Guard Dogs, Etc
- Security Investigative Services, Portsmouth
- Security Services, Portsmouth
- Senior Citizens Service & Health Organizations, Portsmouth
- Service Establishment Supplies & Equipment, Portsmouth
- Sewer & Drain Cleaning & Repair, Portsmouth - Drain Cleaner & Installation Services
- Sewing & Yarn Stores & Supplies, Portsmouth
- Sewing Machine Repair & Service, Portsmouth
- Sewing Machines, Equipment & Supplies, Portsmouth
- Sheet Metal Contractors, Portsmouth - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Portsmouth
- Ship & Boat Building & Repairing, Portsmouth
- Shipping Terminals, Portsmouth
- Shirts & T-Shirts, Portsmouth
- Shoe Repair Shops, Portsmouth
- Shoe Stores, Portsmouth - Mens, Womens & Kids Shoes
- Shoes Orthopedic Repairing, Portsmouth
- Shopping & Shopping Services, Portsmouth
- Siding Contractors, Portsmouth - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Portsmouth
- Skating Rink & Hockey Operation Services, Portsmouth
- Sleep Disorders Treatment & Information Centers, Portsmouth
- Sleep Doctors, Portsmouth - Specialists, Physicians & Surgeons (Sleep Medicine)
- Small Appliances, Portsmouth
- Smoothie Restaurants, Portsmouth
- Snacks & Desserts, Portsmouth
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- Snow Removal Services, Portsmouth - Snow Plow Service
- Soccer Clubs, Portsmouth
- Social Clubs & Organizations, Portsmouth
- Social Services & Welfare, Portsmouth
- Social Workers & Services, Portsmouth
- Societies & Foundation Associations, Portsmouth
- Sororities, Portsmouth
- Soul Food Restaurants, Portsmouth
- Sound Systems Equipment Manufacturers, Portsmouth
- Sound Systems, Microphones & Equipment, Portsmouth
- Special Dies Tools Jigs & Fixtures Manufacturers, Portsmouth
- Special Events & Party Supply Rental, Portsmouth
- Special Interest Schools Or Instruction, Portsmouth
- Specialty Animal Services, Portsmouth
- Specialty Goods Storage, Portsmouth
- Specialty Stores, Portsmouth
- Sporting Goods Equipment Rental, Portsmouth
- Sporting Goods Stores, Portsmouth
- Sports Bars & Lounges, Portsmouth
- Sportswear Clothing Stores, Portsmouth - Sports Clothes
- Sprinkler Alarm Systems, Portsmouth - Fire Sprinkler Systems
- Sprinkler System Contractors, Portsmouth - Garden & Lawn Sprinkler System Installation & Repair
- Staffing & Support Services, Portsmouth
- State Government, Portsmouth
- Stationery & Office Supplies, Portsmouth
- Steamship Companies & Agencies, Portsmouth
- Steel Manufacturers, Portsmouth
- Stock & Bond Brokers & Dealers, Portsmouth
- Stocks & Bond Brokers, Portsmouth
- Storage & Closet Equipment Supplies & Materials, Portsmouth
- Store Fixtures, Portsmouth
- Store Fronts, Portsmouth - Storefront
- Submarine Sandwich Restaurants, Portsmouth
- Substance Abuse Clinics, Portsmouth - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Support Services, Portsmouth
- Surgical Hospitals, Portsmouth - Surgical Centers
- Surplus & Salvage Merchandise, Portsmouth
- Surveyor Services, Portsmouth - Surveying Service
- Sweepers & Scrubbers Industrial, Portsmouth - Sweeping Service
- Swimming, Portsmouth
- Swimming Pool, Sauna & Spa Contractors, Portsmouth
- Swimming Pools Contractors, Portsmouth - Install Inground - Above Ground Pools
- Swimming Pools Supplies, Equipment & Accessories, Portsmouth
- Synagogues & Temples, Portsmouth
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