- 517110 Wired Telecommunications Carriers
- 517911 Telecommunications Resellers
- 517919 All Other Telecommunications
- 518210 Data Processing, Hosting, and Related services
- 541330 Engineering Services
- 541511 Custom Computer Programing
- 541512 Computer Systems Design Services
- 541513 Computer Facilities Management Services
- 541519 Other Computer Related Services
- 541618 Other Management Consulting Services
