North American Industry Classification System (NAICS) Codes

238210	Electrical Contractors
334290	Other Communications Equipment Manufacturing
517110	Wired Telecommunications Carriers
517212	Cellular and Other Wireless Telecommunications
517410	Satellite Telecommunications
517510	Cable and Other Program Distribution
517910	Other Telecommunications
541330	Engineering Services
541511	Custom Computer Programming Services
541512	Computer Systems Design Services

Standard Industrial Classification (SIC) Codes

1731	Electrical Work
3663	Radio & TV Communications Equipment
4813	Telephone Communications, Exc. Radio
4899	Communications Services, NEC
7371	Computer Programming Services
7376	Computer Facilities Management
7377	Computer Maintenance & Repair