Extract and harvest land and natural resources. Main source of employment in lesser developed nations. Becoming more capital intensive in Canada.
e.g. Fish, lumber, mining, agriculture
Convert raw materials into other resources
e.g. Construction, manufacturing, energy production, publishing
Service industry
e.g. Retail, education, travel, insurance, banking, transportation, health, catering, entertainment
Subcategory of the tertiary sector - knowledge based sector of economy.