| E |
| Educational Associations | 162 |
| Educational Consultants & Services | 162 |
| Electric Companies | 162 |
| Electric Consultants | 162 |
| Electric Contractors | 163 |
| Electric Equipment & Supplies | 164 |
| Electric Equipment & Supplies-Whsle | 164 |
| Electric Equipment-Mfrs | 164 |
| Electric Equipment-Service & Repairing | 164 |
| Electric Equipment-Used | 164 |
| Electric Motors Controls-Whsle & Mfrs | 165 |
| Electric Motors-Dealers & Repairing | 165 |
| Electric Motors-Mfrs & Distributors | 165 |
| Electric Switchboards | 165 |
| Electrical Power Systems- Maintenance | 165 |
| Electrolysis | 165 |
| Electronic Control Systems | 165 |
| Electronic Equipment & Supplies- Dealers | 165 |
| Electronic Equipment & Supplies- Service & | 165 |
| Repair |
| Electronic Equipment & Supplies- Whsle & Mfrs | 165 |
| Electronics Research & Development | 165 |
| Elevators-Sales & Service | 165 |
| Embalmers | 165 |
| Embossing | 165 |
| Embroidering Machines | 165 |
| Embroidery | 165 |
| Emergency Medical Services | 166 |
| Emergency Minor Medical Facilities & Services | 166 |
| Emergency Notification Service | 166 |
| Emergency Preparedness | 166 |
| Employment Agencies | 169 |
| Employment Agencies-Temporary | 169 |
| Employment Contractors-Temporary & | 169 |
| Permanent |
| Employment Screening Services | 169 |
| Employment Training Service | 169 |
| Energy Conservation Products & Services | 169 |
| Energy Management & Conservation | 170 |
| Consultants |
| Engineering Equipment & Supplies | 170 |
| Engineers-Professional | 170 |
| Engineers-Professional-Air Conditioning, Heating | 170 |
| & Ventilating |
| Engineers-Professional-Civil | 170 |
| Engineers-Professional-Consulting | 170 |
| Engineers-Professional-Electrical | 170 |
| Engineers-Professional-Marine | 170 |
| Engineers-Professional-Mechanical | 170 |
| Engineers-Professional-Structural | 170 |
| Engineers-Waterway | 171 |
| Engines-Diesel | 171 |
| Engines-Diesel-Fuel Injection-Service & Parts | 171 |
| Engines-Gasoline | 171 |
| Engines-Rebuilding, Repairing & Exchanging | 172 |
| Engines-Supplies, Equipment & Parts | 172 |
| Engravers | 172 |
| Engravers-Plastic, Wood Etc | 172 |
| Entertainers | 172 |
| Envelopes | 172 |
| Environmental Consultants | 172 |
| Environmental, Conservation & Ecological | 172 |
| Organizations |
| Environmental & Ecological Services | 173 |
| Ergonomics Consultants | 173 |