541611: Administrative Management and General Management Consulting Services
Provide C-level “operational decision makers” with managerial counsel, assistance, and advice.

541618: Other Management Consulting Services
Provide “technical program and project administrators” with managerial counsel, assistance, and advice.

541613: Marketing Consulting Services
Provide organizational-specific marketing, communications, policy, planning, forecasting, and other support services.

541810: Advertising Agencies
Provide a full-range of highly-specialized advertising in periodicals, newspapers, radio and television, or other media.

541820: Public Relations Agencies
Provide lobbying, political consulting, or public relations campaigns to promote the image and interests of the client.

541910: Marketing Research and Public Opinion Polling
Provide socio-economic trends based on marketing data, statistical sampling, opinion research, or political polling.

561410: Document Preparation Services
Provide document editing or proofreading, desktop publishing, and other word processing services.

561499: All Other Business Support Services

Provide any other required organizational support service necessary to sustain the client.