An industry is a specific branch of the economy that groups companies and organizations together based on their primary business activities, products, or services. Individual businesses are typically assigned to an industry based on their largest source of revenue.
Modern economies categorize industries into distinct sectors based on their stage in the production chain. The Four Main Economic Sectors
Primary Industry: Extracts raw materials directly from the Earth. Examples include agriculture, mining, forestry, and fishing.
Secondary Industry: Processes raw materials into finished, tangible goods. This includes manufacturing, construction, and utilities.
Tertiary Industry: Provides services rather than physical goods, serving as the commercial backbone of modern economies. This spans retail, banking, entertainment, tourism, and healthcare.
Quaternary Industry: Focuses on intellectual and information-based activities. Examples include information technology (IT), research and development (R&D), education, and consulting. Why Industry Classifications Matter Industry | Definition, Sectors, & Facts | Britannica Money
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