- Safe, Lock & Key Repair Services, Donora - Safes & Vaults Opening & Repair
- Sandblasting, Donora - General Contractors
- Screen Printing, Donora
- Secondary Schools, Donora
- Senior Citizens Service & Health Organizations, Donora
- Service Establishment Supplies & Equipment, Donora
- Sheet Metal Contractors, Donora - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Donora
- Shoe Stores, Donora - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Donora
- Skating Rink & Hockey Operation Services, Donora
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- Skating Rinks & Instructions, Donora
- Skating Supplies, Donora - Ice, Inline, Speed, Figure & Roller Skates
- Social Services & Welfare, Donora
- Societies & Foundation Associations, Donora
- Specialty Stores, Donora
- Sporting Goods Stores, Donora
- State Government, Donora
- State Legislators, Donora
- Steel & Metal Goods, Donora - Steel Distributors
- Store Fronts, Donora - Storefront
- Stoves & Furnace Equipment, Donora - Fittings & Repair Parts
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