- Sandwich Shop Restaurants, Brookfield
- Savings & Loan Associations, Brookfield
- Savings Banks, Brookfield
- Screen Printing, Brookfield
- Secondary Schools, Brookfield
- Security Brokers & Dealers, Brookfield
- Security Guard & Patrol Service, Brookfield - Bodyguard, Guard Dogs, Etc
- Security Services, Brookfield
- Sheet Metal Contractors, Brookfield - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Brookfield
- Shopping & Shopping Services, Brookfield
- Signs, Brookfield
- Snacks & Desserts, Brookfield
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- Social Services & Welfare, Brookfield
- Specialty Stores, Brookfield
- Sporting Goods Stores, Brookfield
- Sports Medicine, Brookfield - Doctors, Physicians & Surgeons
- Stamp Collecting & Coin Dealers , Brookfield
- Steel & Metal Goods, Brookfield - Steel Distributors
- Steel Fabrication & Processing Equipment, Brookfield
- Steel Manufacturers, Brookfield
- Steel Mills & Blast Furnaces, Brookfield
- Stove, Oven, Range & Cooktop Parts & Supplies, Brookfield
- Submarine Sandwich Restaurants, Brookfield
- Surveyor Services, Brookfield - Surveying Service
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