- Baby & Childrens Gifts & Accessories, Northbrook
- Baby Stores, Northbrook - Baby Accessories & Clothes
- Back Care Products, Northbrook
- Bagel Restaurants, Northbrook
- Bagels, Northbrook
- Bakeries, Northbrook
- Baking Supplies & Needs, Northbrook - Flavoring Extracts, Flour & More
- Balloons - Novelty, Toy & Decorative, Northbrook
- Bank Supplies & Equipment, Northbrook
- Banking Attorneys & Lawyers, Northbrook
- Banking Attorneys & Lawyers, Northbrook
- Banking Lawyers & Attorneys, Northbrook
- Bankruptcy Attorneys & Lawyers, Northbrook
- Bankruptcy Attorneys & Lawyers, Northbrook
- Bankruptcy Lawyers & Attorneys, Northbrook
- Banks, Northbrook
- Banners, Flags, Pennants, Decals, Posters & Signs, Northbrook
- Banquet Halls, Northbrook
- Barber Shops, Northbrook
- Barbers, Northbrook
- Bars & Grills, Northbrook
- Baseball & Softball Instruction, Northbrook
- Basement Waterproofing - Waterproofing Contractors, Northbrook - Foundation & Concrete Waterproofing
- Bath Houses, Northbrook
- Bathroom Fixtures, Northbrook - Bathroom Faucets, Bathtubs, Sinks, Shower Heads & Fixtures, etc
- Bathroom Remodeling, Northbrook - Bathroom Remodel & Planning Services
- Battery, Northbrook - Retail Batteries Stores
- Battery Storage, Northbrook
- Bearings, Northbrook
- Beauty Salons, Northbrook
- Bedding & Linens Stores, Northbrook - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedding & Mattress Manufacturers Supplies, Northbrook
- Bedroom Furniture Stores, Northbrook - Master & Kids Bedroom Furniture Sets & Beds
- Bee Control & Removal Services, Northbrook - Bee Removal Companies
- Beer & Wine Stores, Northbrook
- Beverage Dispenser Supplies & Equipment , Northbrook - Beverage Dispensing
- Beverage Stores, Northbrook
- Beverages, Northbrook
- Bicycle Equipment & Clothing, Northbrook
- Bicycle Parts & Accessories, Northbrook
- Bicycle Rentals, Northbrook - Bike Rental
- Bicycle Repair & Service, Northbrook - Bike Repair Shops
- Bicycle Shops, Northbrook - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Billiard Supplies & Equipment, Northbrook - Pool Table
- Biological Research, Northbrook - Biological Labs
- Biotechnology Products & Services, Northbrook
- Bird Repellent, Barrier & Control, Northbrook
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- Blankbooks & Looseleaf Binders Manufacturers, Northbrook
- Blueprint Service, Northbrook - Blueprinting Services
- Boats & Yachts, Northbrook - Yachts, Sailboats & Boats for Sale
- Boiler & Furnace Contractors, Northbrook - Installation, Cleaning & Repair Services
- Boiler Repair & Cleaning, Northbrook
- Bonds, Northbrook
- Bonds Surety & Fidelity, Northbrook
- Book Publishers, Northbrook - Book Printing & Publishing
- Book Stores, Northbrook
- Bookkeeping Systems & Services, Northbrook
- Books, Magazines & Newspapers Stores, Northbrook - Bookstores
- Bottle Dealers, Northbrook
- Bottlers Equipment & Supplies, Northbrook
- Boutiques & Boutique Items, Northbrook
- Boxing Clubs & Instruction, Northbrook
- Breakfast Restaurants, Northbrook
- Brick Masonry & Bricklayer Contractors, Northbrook - Brick Mason - Install & Repair
- Brick Pavers, Northbrook
- Bricks, Blocks & Stone Products, Northbrook - Companies, Wholesale, Manufacturers & Suppliers
- Buddhist Churches, Northbrook
- Builders & Contractors, Northbrook
- Builders & Contractors - More, Northbrook
- Builders Hardware Stores, Northbrook
- Building & Home Inspection, Northbrook - Real Estate, Building, Land & House Inspection Service
- Building & Land Inspection Service, Northbrook
- Building & Property Maintenance & Services, Northbrook
- Building Construction Consultants, Northbrook - Construction Management & Consulting
- Building Design & Construction Consultants, Northbrook
- Building Hardware & Materials, Northbrook
- Building Materials, Northbrook - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Northbrook
- Building Materials, Glass, Northbrook
- Building Restoration & Preservation, Northbrook
- Burglar & Alarm Service, Northbrook - Monitoring Service
- Burglar Alarm Systems, Northbrook
- Bus Rental & Charter Bus Service, Northbrook
- Business & Professional Associations, Northbrook
- Business & Trade Organizations, Northbrook
- Business Communication Consultants, Northbrook
- Business Insurance, Northbrook
- Business Legal Services, Northbrook
- Business Management Consultants, Northbrook
- Business Services, Northbrook
- Business Studio Rental, Northbrook
- Business Wholesale, Northbrook
- Business, Vocational & Technical, Northbrook
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