NAICS MAIN – 541512 Computer Systems Design Services

236220 –	Commercial and Institutional Building Construction
238990 –	All Other Specialty Trade Contractors
237130 –	Power & Communication Line & Related Structures Construction
511210 –	Software Publishers
517919 –	All Other Telecommunications
518210 –	Data Processing, Hosting, and Related Services
519190 –	All Other Information Services
541330 –	Engineering Services
541340 –	Drafting Services
541430 –	Graphic Design Services
541490 –	Other Specialized Design Services
541511 –	Custom Computer Programming Services
541513 –	Computer Facilities Management Services
541519 –	Other Computer Related Services
541618 –	Other Management Consulting Services
541850 –	Display Advertising
811211 –	Consumer Electronics Repair and Maintenance
811212 –	Computer and Office Machine Repair and Maintenance
811213 –	Communication Equipment Repair and Maintenance
811219 –	Other Electronic and Precision Equipment Repair and Maintenance

Standard Industrial Classification (SIC)

4813 –	TELEPHONE COMMUNICATIONS, EXC.RADIO
4899 –	COMMUNICATION SERVICES, NEC
7379 –	COMPUTER RELATED SERVICES