| Hearing Aids | 102 |
| Hearing Aids-Parts & Repairing | 102 |
| Hearing Impaired Equipment & Supplies | 103 |
| Heat Pumps | 103 |
| Heating Contractors | 103 |
| Heating Equipment | 104 |
| Heating Equipment & Systems- Supplies & Parts | 104 |
| Home Builders | 104 |
| Home Designing & Planning Service | 104 |
| Home Health Care Equipment & Supplies | 104 |
| Home Health Services | 104 |
| Home Improvements | 105 |
| Home Inspection Service | 105 |
| Home Repairs & Maintenance Services | 105 |
| Hospices | 105 |
| Hospital Consultants | 105 |
| Hospital Equipment & Supplies | 106 |
| Hospitals | 106 |
| Hotels | 107 |
| House & Building Movers | 110 |
| House Cleaning | 110 |
| House Washing-Exterior | 110 |
| Hunting & Fishing Licenses | 110 |
| I |
| Ice | 110 |
| Industrial Equipment & Supplies | 110 |
| Insecticides | 112 |
| Insulation Contractors-Cold & Heat | 112 |
| Insulation Materials-Cold & Heat | 112 |
| Insurance | 112 |
| Insurance Consultants | 113 |
| Insurance-Automobile & Vehicle | 113 |
| Insurance-Burial | 113 |
| Insurance-Business & Commercial | 113 |
| Insurance-Fire | 113 |
| Insurance-General | 113 |
| Insurance-Health & Accident | 113 |
| Insurance-Liability & Malpractice | 113 |
| Insurance-Life | 113 |
| Interior Decorators | 114 |
| Internet-Advertising | 114 |
| Internet Products & Services | 115 |
| Internet-Marketing Services | 115 |
| Investigators | 115 |
| Investment Securities | 115 |
| Invitations & Announcements | 115 |
| Ironwork | 115 |
| Irrigation Systems & Equipment | 116 |
| Irrigation Systems-Repair & Service | 117 |
| J |
| Janitorial Service | 118 |
| Jewelers | 119 |
| Jewelry Buyers | 120 |
| Jewelry-Repairing | 120 |