- Ice Cream & Frozen Desserts, Andover
- Ice Cream & Frozen Yogurt, Andover
- Individual & Family Information & Referral Services, Andover
- Industrial & Commercial Cleaning Services & Companies, Andover
- Industrial & Commercial Real Estate, Andover
- Industrial Contractors, Andover
- Industrial Engineers & Designers, Andover - Architectural Designers
- Industrial Equipment & Machinery, Andover
- Industrial Goods & Products - Hard Goods - Small, Andover
- Industrial Goods & Products - Soft - Large & Small, Andover
- Industrial Instrumentation, Andover
- Industrial Lifts, Andover
- Industrial Supply, Parts & Equipment - Miscellaneous, Andover
- Industry, Andover
- Information Retrieval Services, Andover
- Information Technology Services, Andover - IT Service
- Inks - Manufacturing, Andover
- Inspection & Testing Services, Andover
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- Instruments & Control Equipment, Andover
- Insurance Adjusters, Andover
- Insurance Brokers, Andover
- Insurance Carriers, Andover
- Insurance Carriers By Specialty, Andover
- Insurance Employee Benefits, Andover
- Insurance Major Medical, Andover
- Insurance Services, Andover
- Interior Designers, Andover
- Interior Designers & Decorators, Andover
- Internet Providers, Andover
- Internet Services, Andover
- Investment Bankers, Andover
- Investment Management Services, Andover
- Investment Services & Advisors, Andover
- Investments & Mutual Funds, Andover
- Iron, Steel & Metal Fabricators, Andover - Fabrication Companies
- Italian Restaurants, Andover
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