- Hair Care Products, Somerville
- Hair Care Professionals, Somerville
- Hair Weaving, Somerville
- Hamburger Restaurants, Somerville
- Handicapped Services, Somerville
- Hardware Stores, Somerville
- Hazardous Materials & Waste Services, Somerville
- Health & Fitness Program Consultants & Trainers, Somerville
- Health & Medical, Somerville
- Health And Medical Centers, Somerville
- Health Care Information & Services, Somerville
- Health Care Plans, Somerville
- Health Charitable & Non-Profit Organizations, Somerville
- Health Clubs & Gymnasiums, Somerville
- Health Insurance, Somerville
- Healthcare Consultants, Somerville
- Healthcare Providers, Practitioners & Professionals, Somerville
- Hearing Testing, Assessment & Hearing Aids, Somerville - Hearing Impaired Services
- Heating & Air-Conditioning Contractors, Somerville - HVAC Contractors - Installation, Repair, Replace Service, etc
- Heating & Plumbing Supplies Stores, Somerville
- Heating Contractors, Somerville - Heating Systems - Installation & Repair
- Hobby & Model Shops & Supplies, Somerville
- Holiday & Seasonal Merchandise Stores & Products, Somerville
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- Holography Services, Somerville
- Home Additions & Remodeling Contractors, Somerville - Refinishing & Restoration
- Home Appliance Repair, Sales & Services, Somerville
- Home Decor Stores, Somerville - Home Decorations, Supplies & Accessories
- Home Furnishings, Somerville - Home Decor Stores, Items & Accessories
- Home Health Care, Somerville - Agencies & Services
- Homeless Services, Somerville
- Homeowners Insurance, Somerville
- Homes Mentally Handicapped, Somerville
- Hospices, Somerville - Hospice Services
- Hospital & Medical Insurance Plans, Somerville
- Hospital, Dental & Medical Equipment & Supplies, Somerville
- Hospitals, Somerville
- Hot Dog Restaurants, Somerville
- Hotel & Motel Management Consultants, Somerville
- Hotel Motel & Resort Reservations, Somerville
- Hotels & Motels, Somerville
- House & Apartment Cleaning, Somerville
- House Cleaning Supplies & Equipment, Somerville
- Household & Commercial Appliances Stores, Somerville
- Household Goods & Furniture Storage , Somerville
- Housing Authority, Somerville
- Human Resource Management , Somerville
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