- Individual & Family Information & Referral Services, Jefferson City
- Individual & Family Services, Jefferson City
- Industrial & Commercial Cleaning Services & Companies, Jefferson City
- Industrial & Heavy Equipment Repair & Service, Jefferson City
- Industrial Contractors, Jefferson City
- Industrial Goods & Products - Hard Goods - Large, Jefferson City
- Industrial Goods & Products - Hard Goods - Small, Jefferson City
- Industrial Goods & Products - Soft - Large & Small, Jefferson City
- Industrial Machinery Supplies & Equipment - Leasing & Rental, Jefferson City
- Industry, Jefferson City
- Information Bureaus & Services, Jefferson City
- Inks, Jefferson City
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- Inks Manufacturing Materials, Jefferson City - Inks Manufacturers Equipment
- Insecticides, Termite & Pest Control, Jefferson City - Pesticides
- Insurance Carriers, Jefferson City
- Insurance Farm, Jefferson City
- Insurance General Liability, Jefferson City
- Insurance Motorcycles, Jefferson City
- Insurance Renters, Jefferson City
- Internal Medicine Doctors, Jefferson City - Internists Physicians & Surgeons
- Investment Management Services, Jefferson City
- Investment Services & Advisors, Jefferson City
- Italian Restaurants, Jefferson City
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