Sector

Classification of statistical entities engaged in similar kinds of activities.

"Sector" is a specific term used in the United Nations System of National Accounts (SNA) to denote one of the mutually exclusive institutional sectors that group together institutional units on the basis of their principal functions, behaviour and objectives: nonfinancial corporations, financial corporations, general government, non-profit institutions serving households (NPISHs), and households.

A sector can be a subgroup of an economic activity - as in "coal mining sector" - or a group of economic activities - as in "service sector" - or a cross-section of a group of economic activities - as in "informal sector".

International Monetary Fund (IMF), "Revised Manual for the PPI - Glossary", Washington DC 

CL_SECTOR