| Insurance-Property & Casualty | 494 |
| Insurance-Risk Management | 494 |
| Insurance-Title | 494 |
| Insurance-Trucks-Commercial | 495 |
| Insurance-Worker’s Compensation | 495 |
| Intercom Systems & Services | 495 |
| Interior Decorators | 495 |
| Interior Decorators’ & Designers’ Supplies-Whsle | 496 |
| & Mfrs |
| Interior Designers | 496 |
| International Trade Consultants | 497 |
| Internet Products & Services | 497 |
| Internet-Advertising | 497 |
| Internet-Marketing Services | 497 |
| Internet-Service Providers | 497 |
| Invention Marketing Services | 497 |
| Inventory Service | 497 |
| Investigators | 498 |
| Investment Advisory Service | 498 |
| Investment Securities | 498 |
| Investments-Real Estate | 499 |
| Invitations & Announcements | 499 |
| Ironwork | 499 |
| Irrigation Systems & Equipment | 500 |
| J |
| Jacks-Repairing | 500 |
| Janitorial Equipment & Supplies | 500 |
| Janitorial Equipment & Supplies- Whsle, Mfrs & | 501 |
| Distributors |
| Janitorial Service | 501 |
| Jeans | 502 |
| Jewelers | 502 |
| Jewelers’ Supplies | 504 |
| Jewelers-Whsle | 504 |
| Jewelry Brokers | 504 |
| Jewelry Buyers | 504 |
| Jewelry Castings | 504 |
| Jewelry Designers | 504 |
| Jewelry Engravers | 505 |
| Jewelry Mfrs | 505 |
| Jewelry-Repairing | 505 |
| Juices | 505 |
| Juke Boxes | 505 |
| K |
| Karaoke | 505 |
| Karate & Other Martial Arts Instruction | 505 |
| Karate & Other Martial Arts Supplies & | 505 |
| Equipment |
| Kennels | 506 |
| Kerosene | 506 |
| Keys | 506 |
| Kitchen Accessories | 506 |
| Kitchen Cabinets & Equipment | 506 |
| Kitchen Remodeling | 507 |
| Knives-Machine | 507 |
| L |
| Labeling Equipment | 507 |
| Labels-Plastic, Metal, Foil, Etc | 507 |
| Labor Organizations | 507 |
| Labor Relations Consultants | 508 |