541611 – Administrative Management and General Management Consulting Services
541612 – Human Resources Consulting Services
541613 – Marketing Consulting Services
541614 – Process, Physical Distribution, and Logistics Consulting Services
541618 – Other Management Consulting Services
541690 – Other Scientific and Technical Consulting Services
541720 – Research and Development in the Social Sciences and Humanities
541810 – Advertising Agencies
541820 – Public Relations Agencies
541830 – Media Buying Agencies
541840 – Media Representatives
541850 – Indoor and Outdoor Display Advertising
541860 – Direct Mail Advertising
541870 – Advertising Material Distribution Services
541890 – Other Services Related to Advertising
541910 – Marketing Research and Public Opinion Polling
541990 – All Other Professional, Scientific, and Technical Services
611310 – Colleges, Universities, and Professional Schools
611420 – Computer Training
611430 – Professional and Management Development Training
611691 – Exam Preparation and Tutoring
611699 – All Other Miscellaneous Schools and Instruction
611710 – Educational Support Services
519290 – Web Search Portals, Libraries, Archives, and Other Information Services
518210 – Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services
541511 – Custom Computer Programming Services
541512 – Computer Systems Design Services
541519 – Other Computer Related Services
561110 – Office Administrative Services
561499 – All Other Business Support Services
813920 – Professional Organizations
813410 – Civic and Social Organizations
