- Hair Care Professionals, Placentia
- Hair Removal Permanent, Placentia
- Hamburger Restaurants, Placentia
- Hardware Stores, Placentia
- Head Start Centers, Placentia
- Health & Diet Food Products - Wholesale & Retail, Placentia
- Health & Fitness Program Consultants & Trainers, Placentia
- Health & Medical, Placentia
- Health And Medical Centers, Placentia
- Health Care Information & Services, Placentia
- Health Clubs & Gymnasiums, Placentia
- Health Insurance, Placentia
- Healthcare Consultants, Placentia
- Healthcare Providers, Practitioners & Professionals, Placentia
- Heat Exchange Equipment, Placentia - Heat Exchanger
- Heating & Air Conditioning Equipment, Parts & Supplies, Placentia - HVAC Suppliers & Companies
- Heating & Air Conditioning Repair, Installation & Service Contractors, Placentia - HVAC Contractors
- Heating & Air-Conditioning Contractors, Placentia - HVAC Contractors - Installation, Repair, Replace Service, etc
- Heating & Plumbing Supplies Stores, Placentia
- Heating Contractors, Placentia - Heating Systems - Installation & Repair
- Heating Equipment & Systems - Cleaning & Repair, Placentia - Heat Pump, Incinerator, Heat Exchanger, Heaters, Etc
- Heavy Equipment Hauling, Placentia
- Highway Surfacing & Paving Contractors, Placentia - Pavers - Paving Companies
- Hobby & Model Shops & Supplies, Placentia
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- Holiday Merchandise, Placentia
- Home Additions & Remodeling Contractors, Placentia - Refinishing & Restoration
- Home Appliance Repair, Sales & Services, Placentia
- Home Decor Accessories & Supplies, Placentia - Wholesale & Suppliers
- Home Decor Stores, Placentia - Home Decorations, Supplies & Accessories
- Home Health Care, Placentia - Agencies & Services
- Home Security Companies & Services, Placentia - Home Alarm Systems & Security Systems, Video Surveillance System, Etc
- Homeowners Associations Bookkeeping Services, Placentia
- Homeowners Insurance, Placentia
- Horse Dealers, Placentia
- Hospices, Placentia - Hospice Services
- Hospital, Dental & Medical Equipment & Supplies, Placentia
- Hospitals, Placentia
- Hot Dog Restaurants, Placentia
- Hot Tubs, Spas, & Whirlpool Baths, Placentia
- Hotel & Motel Equipment & Supplies, Placentia
- Hotel Motel & Resort Reservations, Placentia
- Hotels & Motels, Placentia
- House & Apartment Cleaning, Placentia
- House & Building Washing & Maintenance Exterior, Placentia
- Household & Commercial Appliances Stores, Placentia
- Household Goods & Furniture Storage , Placentia
- Housing Associations, Placentia
- Housing Authority, Placentia
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