An industry is a specific group of businesses or manufacturers that operate in the same economic sphere, share similar business activities, and offer closely related products or services. Collectively, industries drive global economic growth, process raw resources, and provide employment for billions of people. The Industry Hierarchy
In economic terms, individual businesses are categorized into industries, which are further grouped into broader categories called sectors. Formal frameworks like the Global Industry Classification Standard (GICS) or North American Industry Classification System (NAICS) help investors and economists track these groups. For instance, a car manufacturer belongs to the automotive industry, which sits under the larger consumer discretionary sector. The Four Main Economic Sectors
To understand how industries work, economists divide them into four distinct types based on their primary economic activity: Industry | Definition, Sectors, & Facts | Britannica Money
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