Professional Services

Professional Services comprises companies engaged in the Research & Consulting Services and Human Resource & Employment Services sub-industries.

The Global Industry Classification Standard (GICS) is a four-tiered, hierarchical industry classification system. It consists of 10 sectors, 24 industry groups, 67 industries and 156 sub-industries.

http://www.msci.com/products/indexes/sector/gics/gics_structure.html