NAICS Codes

238210  Electrical contractors and other wiring installation contractors
238290  Other building equipment contractors
238990  All other specialty trade contractors
423430  Computer and computer peripheral equipment and software merchant wholesalers
423440  Other commercial equipment merchant wholesalers
423610  Electrical apparatus and equipment, wiring supplies, and related equipment merchant wholesalers
423620  Electrical and electronic appliance, television and radio merchant wholesalers
423690  Other electronic parts and equipment wholesalers
517911  Telecommunications resellers
517919  All other telecommunications
519190  All other information services
541330  Engineering services
541690  Other scientific and technical consulting services
541990  All other professional, scientific and technical services
811213  Communications equipment repair and maintenance
811219  Other electronic and precision equipment repair and   maintenance