GDP composition of sector and labour force by occupation. The green, red, and blue components of the colours of the countries represent the percentages for the agriculture, industry, and services sectors, respectively. Industry (from Latin industrius, "diligent, industrious"), is the segment of economy concerned with the production of goods and services. Industry began in its present form during the 1800s, aided by technological advances, and it has continued to develop to this day. Many developed countries (The UK, The U.S. and Canada for example) and many developing/semi-developed countries (People's Republic of China, India etc.) depend significantly on industry. Industries, the countries they reside in, and the economies of those countries are interlinked in a complex web that may be hard to understand at first glance. Industry in the second sense became a key sector of production in European and North American countries during the Industrial Revolution, which upset previous mercantile and feudal economies through many successive rapid advances in technology, such as the steel and coal production. Industrial countries then assumed a capitalist economic policy. Railroads and steam-powered ships began speedily establishing links with previously unreachable world markets, enabling private companies to develop to then-unheard of size and wealth. Manufacturing is a wealth producing sector in an economy. Following the Industrial Revolution, perhaps a third of the world's economic output is derived from manufacturing industries—more than agriculture's share. In economics and urban planning, industrial is a type of land use and economic activity involved with manufacturing and production.

Clark's Sector Model (1950)