| NAICS code | NAICS Text
| SIC code | SIC Text
|
| 2211 | Electric Power Generation, Transmission and Distribution | | |
| 221110 | Electric Power Generation | | |
| 221120 | Electric Power Transmission, Control, and Distribution | | |
| 221121 | Electric Bulk Power Transmission and Control | 4911 | Electric Services (electric power transmission and control) |
| 221121 | Electric Bulk Power Transmission and Control | 4931 | Electric and Other Services Combined (electric power transmission and control) |
| 221121 | Electric Bulk Power Transmission and Control | 4939 | Combination Utilities, NEC (electric power transmission and control) |
| 221122 | Electric Power Distribution | 4911 | Electric Services (electric power distribution) |
| 221122 | Electric Power Distribution | 4931 | Electric and Other Services Combined (electric power distribution) |
| 221122 | Electric Power Distribution | 4939 | Combination Utilities, NEC (electric power distribution) |
| 2353 | Electrical Contractors | | |
| 235310 | Electrical Contractors | 1731 | Electrical Work |
| 235930 | Excavation Contractors | 1794 | Excavation Work |
| 321213 | Engineered Wood Member (except Truss) Manufacturing | 2439 | Structural Wood Members, NEC (except trusses) |
| 322232 | Envelope Manufacturing | 2677 | Envelopes |
| 325193 | Ethyl Alcohol Manufacturing | 2869 | Industrial Organic Chemicals (ethyl alcohol) |
| 325920 | Explosives Manufacturing | 2892 | Explosives |
| 331112 | Electrometallurgical Ferroalloy Product Manufacturing | 3313 | Electrometallurgical Products, Except Steel |
| 332813 | Electroplating, Plating, Polishing, Anodizing, and Coloring | 3399 | Primary Metal Products, NEC (laminating steel) |
| 332813 | Electroplating, Plating, Polishing, Anodizing, and Coloring | 3471 | Electroplating, Plating, Polishing, Anodizing, and Coloring |
| 332998 | Enameled Iron and Metal Sanitary Ware Manufacturing | 3431 | Enameled Iron and Metal Sanitary Ware |
| 3336 | Engine, Turbine, and Power Transmission Equipment Manufacturing | | |
| 333610 | Engine, Turbine, and Power Transmission Equipment Manufacturing | | |
| 333921 | Elevator and Moving Stairway Manufacturing | 3534 | Elevators and Moving Stairways |
| 334111 | Electronic Computer Manufacturing | 3571 | Electronic Computers |
| 334411 | Electron Tube Manufacturing | 3671 | Electron Tubes |
| 334414 | Electronic Capacitor Manufacturing | 3675 | Electronic Capacitors |
| 334415 | Electronic Resistor Manufacturing | 3676 | Electronic Resistors |
| 334416 | Electronic Coil, Transformer, and Other Inductor Manufacturing | 3677 | Electronic Coils, Transformers, and Other Inductors |
| 334417 | Electronic Connector Manufacturing | 3678 | Electronic Connectors |
| 334510 | Electromedical and Electrotherapeutic Apparatus Manufacturing | 3842 | Orthopedic, Prosthetic and Surgical Appliances and Supplies (electronic hearing aids) |
| 334510 | Electromedical and Electrotherapeutic Apparatus Manufacturing | 3845 | Electromedical and Electrotherapeutic Apparatus (other electromedical and electrotherapeutic apparatus) |
| 335 | Electrical Equipment, Appliance, and Component Manufacturing | | |
| 3351 | Electric Lighting Equipment Manufacturing | | |
| 335110 | Electric Lamp Bulb and Part Manufacturing | 3641 | Electric Lamp Bulbs and Tubes |
| 335211 | Electric Housewares and Household Fan Manufacturing | 3634 | Electric Housewares and Fans (except wall and baseboard heating units for permanent installation and elec |
| 335211 | Electric Housewares and Household Fan Manufacturing | 3999 | Manufacturing Industries, NEC (electric hair clippers for humans) |
| 3353 | Electrical Equipment Manufacturing | | |
| 335310 | Electrical Equipment Manufacturing | | |
| 4216 | Electrical Goods Wholesalers | | |
| 421610 | Electrical Apparatus and Equipment, Wiring Supplies, and Construction Material Wholesalers | 5063 | Electrical Apparatus and Equipment, Wiring Supplies and Construction Materials (except electrical supplie |
| 421620 | Electrical Appliance, Television, and Radio Set Wholesalers | 5064 | Electrical Appliances, Television and Radio Sets |
| 443 | Electronics and Appliance Stores | | |
| 4431 | Electronics and Appliance Stores | | |
| 4541 | Electronic Shopping and Mail-Order Houses | | |
| 454110 | Electronic Shopping and Mail-Order Houses | 5961 | Catalog and Mail-Order Houses |
| 541330 | Engineering Services | 8711 | Engineering Services |
| 541330 | Engineering Services | 8748 | Business Consulting Services, NEC (traffic engineering consulting) |
| 541620 | Environmental Consulting Services | 8999 | Services, NEC (environmental consultants) |
| 5613 | Employment Services | | |
| 561310 | Employment Placement Agencies | 7299 | Miscellaneous Personal Services, NEC (babysitting bureaus) |
| 561310 | Employment Placement Agencies | 7361 | Employment Agencies (except executive placing services) |
| 561310 | Employment Placement Agencies | 7819 | Services Allied to Motion Picture Production (casting bureaus) |
| 561310 | Employment Placement Agencies | 7922 | Theatrical Producers and Miscellaneous Theatrical Services (casting agencies) |
| 561330 | Employee Leasing Services | 7363 | Help Supply Services (except temporary help service) |
| 561710 | Exterminating and Pest Control Services | 4959 | Sanitary Services, NEC (mosquito eradication) |
| 561710 | Exterminating and Pest Control Services | 7342 | Disinfecting and Pest Control Services (exterminating and pest control) |
| 61 | Educational Services | | |
| 611 | Educational Services | | |
| 6111 | Elementary and Secondary Schools | | |
| 611110 | Elementary and Secondary Schools | 8211 | Elementary and Secondary Schools |
| 611691 | Exam Preparation and Tutoring | 8299 | Schools and Educational Services, NEC (exam preparation and tutoring) |
| 6117 | Educational Support Services | | |
| 611710 | Educational Support Services | 8299 | Schools and Educational Services NEC (except instruction) |
| 611710 | Educational Support Services | 8748 | Business Consulting Services, NEC (educational test development and evaluation services, educational test |
| 624230 | Emergency and Other Relief Services | 8322 | Individual and Family Social Services (emergency and relief services) |
| 8112 | Electronic and Precision Equipment Repair and Maintenance | | |
| 811210 | Electronic and Precision Equipment Repair and Maintenance | | |
| 813312 | Environment, Conservation and Wildlife Organizations | 8399 | Social Services, NEC (environment, conservation, and wildlife advocacy) |
| 813312 | Environment, Conservation and Wildlife Organizations | 8699 | Membership Organizations, NEC (humane societies) |
| 921 | Executive, Legislative, and Other General Government Support | | |
| 9211 | Executive, Legislative, and Other General Government Support | | |
| 921110 | Executive Offices | 9111 | Executive Offices |
| 921140 | Executive and Legislative Offices, Combined | 9131 | Executive and Legislative Office, Combined |