- Ice Cream & Frozen Yogurt, Burlington
- Ice Wholesale, Burlington - Dry Ice
- Imported Auto Parts, Burlington
- Industrial & Commercial Cleaning Services & Companies, Burlington
- Industrial & Commercial Real Estate, Burlington
- Industrial & Heavy Equipment Repair & Service, Burlington
- Industrial & Heavy Vehicle Dealers, Burlington
- Industrial Contractors, Burlington
- Industrial Equipment & Machinery, Burlington
- Industrial Goods & Products - Hard Goods - Large, Burlington
- Industrial Goods & Products - Hard Goods - Small, Burlington
- Industrial Goods & Products - Soft - Large & Small, Burlington
- Industrial Heaters & Boilers, Burlington
- Industrial Machinery Supplies & Equipment - Leasing & Rental, Burlington
- Industrial Pump Repair & Service, Burlington - Centrifugal, Positive Displacement, Submersible, Diaphragm, Hydraulic, Water, Vacuum Pumps, etc
- Industrial Pumps, Burlington - Centrifugal, Positive Displacement, Submersible, Diaphragm, Hydraulic, Water, Vacuum Pump, etc
- Industrial Tanks, Burlington
- Industrial Trucks, Burlington
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- Industrial Waterway & Dock Construction, Burlington
- Industry, Burlington
- Information Bureaus & Services, Burlington
- Inspection & Testing Services, Burlington
- Insurance Brokers, Burlington
- Insurance Carriers, Burlington
- Insurance Farm, Burlington
- Insurance Motorcycles, Burlington
- Insurance Retirement Annuities & Pension, Burlington
- Insurance Services, Burlington
- Interior Designers, Burlington
- Interior Designers & Decorators, Burlington
- Investment Management Services, Burlington
- Investment Services & Advisors, Burlington
- Iron, Steel & Metal Fabricators, Burlington - Fabrication Companies
- Irrigation Systems & Equipment, Burlington
- Italian Restaurants, Burlington
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