- Ice Cream & Frozen Yogurt, South Burlington
- Ice Skating Rinks, South Burlington
- Ice Sports Clubs & Instruction, South Burlington
- Importers, South Burlington
- Industrial & Commercial Cleaning Services & Companies, South Burlington
- Industrial & Commercial Real Estate, South Burlington
- Industrial & Commercial Real Estate Companies, South Burlington
- Industrial & Heavy Equipment Repair & Service, South Burlington
- Industrial & Heavy Equipment Vehicle Rental & Leasing, South Burlington
- Industrial Contractors, South Burlington
- Industrial Equipment & Machinery, South Burlington
- Industrial Goods & Products - Hard Goods - Large, South Burlington
- Industrial Goods & Products - Hard Goods - Small, South Burlington
- Industrial Heaters & Boilers, South Burlington
- Industrial Machinery Supplies & Equipment - Leasing & Rental, South Burlington
- Industrial Supply, Parts & Equipment - Miscellaneous, South Burlington
- Industrial Tools, South Burlington
- Industry, South Burlington
- Information Bureaus & Services, South Burlington
- Information Retrieval Services, South Burlington
- Inspection & Testing Services, South Burlington
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- Insulation & Energy Conservation Materials, South Burlington
- Insurance Brokers, South Burlington
- Insurance Carriers, South Burlington
- Insurance Consulting & Information Services, South Burlington
- Insurance Farm, South Burlington
- Insurance General Liability, South Burlington
- Insurance Motorcycles, South Burlington
- Insurance Renters, South Burlington
- Insurance Services, South Burlington
- Insurance Third Party Administrators, South Burlington
- Insurance Underwriters, South Burlington
- Interior Designers, South Burlington
- Interior Designers & Decorators, South Burlington
- Internal Medicine Doctors, South Burlington - Internists Physicians & Surgeons
- Internet Services, South Burlington
- Investment Management Services, South Burlington
- Investment Services & Advisors, South Burlington
- Iron, Steel & Metal Fabricators, South Burlington - Fabrication Companies
- Italian Foods, South Burlington
- Italian Restaurants, South Burlington
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