This is the Economic Sector according to the Thomson Reuters Business Classification Schema (TRBC). There are 10 economic sectors in the schema which classify stocks across broad economic segments such as Technology and Financials.
There are 10 broad Economic Sectors. Financials, Basic Materials, Energy, Consumer Defensive, Consumer Cyclical, Telecoms, Utilities, Healthcare, Industrials and Technology.
Each sector contains multiple Industry Groups which are unique to it.