- Ice Cream & Frozen Yogurt, North Kingstown
- Industrial & Commercial Cleaning Services & Companies, North Kingstown
- Industrial & Commercial Real Estate, North Kingstown
- Industrial & Heavy Equipment Repair & Service, North Kingstown
- Industrial & Personal Service Paper, Boxes & Cardboard, North Kingstown
- Industrial Contractors, North Kingstown
- Industrial Equipment & Machinery, North Kingstown
- Industrial Goods & Products - Hard Goods - Large, North Kingstown
- Industrial Goods & Products - Hard Goods - Small, North Kingstown
- Industrial Goods & Products - Soft - Large & Small, North Kingstown
- Industrial Machinery Supplies & Equipment - Leasing & Rental, North Kingstown
- Industrial Pumps, North Kingstown - Centrifugal, Positive Displacement, Submersible, Diaphragm, Hydraulic, Water, Vacuum Pump, etc
- Industrial Supply, Parts & Equipment - Miscellaneous, North Kingstown
- Industry, North Kingstown
- Information Retrieval Services, North Kingstown
- Information Technology Services, North Kingstown - IT Service
- Inspection & Testing Services, North Kingstown
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- Instruments & Control Equipment, North Kingstown
- Insurance Advisors, North Kingstown
- Insurance Brokers, North Kingstown
- Insurance Carriers, North Kingstown
- Insurance Carriers By Specialty, North Kingstown
- Insurance Consulting & Information Services, North Kingstown
- Insurance Employee Benefits, North Kingstown
- Insurance General Liability, North Kingstown
- Insurance Motorcycles, North Kingstown
- Insurance Renters, North Kingstown
- Insurance Services, North Kingstown
- Interior Designers & Decorators, North Kingstown
- Internet Services, North Kingstown
- Investment Services & Advisors, North Kingstown
- Iron, Steel & Metal Fabricators, North Kingstown - Fabrication Companies
- Italian Restaurants, North Kingstown
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