- Ice Cream & Frozen Yogurt, Nicholasville
- Imported Auto Parts, Nicholasville
- Individual & Family Information & Referral Services, Nicholasville
- Individual & Family Services, Nicholasville
- Industrial & Commercial Cleaning Services & Companies, Nicholasville
- Industrial & Commercial Real Estate, Nicholasville
- Industrial & Heavy Equipment Repair & Service, Nicholasville
- Industrial & Heavy Equipment Vehicle Rental & Leasing, Nicholasville
- Industrial & Personal Service Paper, Boxes & Cardboard, Nicholasville
- Industrial Contractors, Nicholasville
- Industrial Equipment & Machinery, Nicholasville
- Industrial Equipment & Machinery - Other, Nicholasville
- Industrial Goods & Products - Hard Goods - Large, Nicholasville
- Industrial Goods & Products - Hard Goods - Small, Nicholasville
- Industrial Goods & Products - Soft - Large & Small, Nicholasville
- Industrial Heaters & Boilers, Nicholasville
- Industrial Machinery Supplies & Equipment - Leasing & Rental, Nicholasville
- Industrial Supply, Parts & Equipment - Miscellaneous, Nicholasville
- Industrial Trucks, Nicholasville
- Industrial Waste Disposal, Nicholasville
- Industrial Waste Recycling, Nicholasville
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- Industry, Nicholasville
- Information Technology Services, Nicholasville - IT Service
- Inspection & Testing Services, Nicholasville
- Insulation Contractors, Nicholasville - Blown-In, Spray Foam, Batt, Fiberglass, Attic Insulation Installation & Service
- Insurance Brokers, Nicholasville
- Insurance Carriers, Nicholasville
- Insurance Farm, Nicholasville
- Insurance General Liability, Nicholasville
- Insurance Livestock, Nicholasville
- Insurance Motorcycles, Nicholasville
- Insurance Renters, Nicholasville
- Insurance Services, Nicholasville
- Interior Designers, Nicholasville
- Interior Designers & Decorators, Nicholasville
- Internet Marketing & Advertising Services, Nicholasville
- Internet Providers, Nicholasville
- Internet Services, Nicholasville
- Investment Management Services, Nicholasville
- Investment Services & Advisors, Nicholasville
- Iron, Steel & Metal Fabricators, Nicholasville - Fabrication Companies
- Italian Restaurants, Nicholasville
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