- Imprinting & Embossing Services, West Roxbury
- Independent Synagogues, West Roxbury
- Indian Restaurants, West Roxbury
- Industrial & Commercial Cleaning Services & Companies, West Roxbury
- Industrial & Commercial Real Estate, West Roxbury
- Industrial Contractors, West Roxbury
- Industrial Equipment & Machinery, West Roxbury
- Industrial Goods & Products - Hard Goods - Large, West Roxbury
- Industrial Goods & Products - Hard Goods - Small, West Roxbury
- Industrial Heaters & Boilers, West Roxbury
- Industrial Machinery Supplies & Equipment - Leasing & Rental, West Roxbury
- Industry, West Roxbury
- Information Retrieval Services, West Roxbury
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- Inspection & Testing Services, West Roxbury
- Insurance Brokers, West Roxbury
- Insurance Carriers, West Roxbury
- Insurance General Liability, West Roxbury
- Insurance Motorcycles, West Roxbury
- Insurance Renters, West Roxbury
- Insurance Services, West Roxbury
- Interior Designers & Decorators, West Roxbury
- Internet Entertainment, West Roxbury - Internet Services
- Internet Services, West Roxbury
- Internet Websites, West Roxbury - Web Hosting, etc
- Investment Services & Advisors, West Roxbury
- Italian Restaurants, West Roxbury
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