NAICS and SIC CODE CLASSIFICATIONS

North American Industry Classification System (NAICS)
 

237130 - Power and Communication Line and
               Related Structures Construction

238210 - Electrical Contractors and Other Wiring Installation Contractors

238990 - All Other Specialty Trade Contractors

517919 - All Other Telecommunications

518210 - Data Processing, Hosting, and Related Services

541511 - Custom Computer Programming Services

541512 - Computer Systems Design Services

541519 - Other Computer Related Services

561621- Security Alarm Systems Sales Combined with Installation, Repair or
              Monitoring Services
     

Standard Industrial Classification (SIC)

 1731 - Electrical Work

 1799 - Special Trade Contractors

 7371 - Computer Programming Services

 7375 - Information Retrieval Services

 7378 - Computer Maintenance & Repair

 7379 - Computer Related Services

 7382 - Security System Services