The secondary sector of industry includes those economic sectors that create a finished, usable product: manufacturing and construction. The Economy may be classified into subdivisions called sectors (also called Industries) in several ways The three-sector hypothesis is an economic theory which divides economies into three sectors of activity extraction of raw materials ( primary) manufacturing ( Colin Grant Clark ( November 2, 1905 - September 4, 1989) was a British Economist and Statistician who worked Jean Fourastié ( April 15, 1907, in Saint-Benin-d'Azy, France - July 25, 1990, in Douelle, France The public sector is the part of economic and administrative life that deals with the delivery of goods and services by and for the Government, whether national Regional In Economics, the private sector is that part of the economy which is both run for private Profit and is not controlled by the State. The voluntary sector (also non-profit sector) is the sphere of social activity undertaken by Organizations that are non-profit and non-governmental Manufacturing (from Latin manu factura, "making by hand" is the use of tools and labor to make things for use or sale In the fields of Architecture and Civil engineering, construction is a process that consists of the Building or assembling of Infrastructure If you work in this sector you may also manufacture or process products. This sector of industry generally takes the output of the primary sector and manufactures finished goods or where they are suitable for use by other businesses, for export, or sale to domestic consumers. This sector is often divided into light industry and heavy industry. Light industry is usually less Capital intensive than Heavy industry, and is more Consumer -oriented than Business -oriented (i Heavy industry does not have a single fixed meaning as compared to Light industry. Many of these industries consume large quantities of energy and require factories and machinery to convert the raw materials into goods and products. They also produce waste materials and waste heat that may pose environmental problems or cause pollution.
Some economists contrast wealth producing sectors in an economy such as manufacturing with the service sector which tends to be wealth consuming. Manufacturing (from Latin manu factura, "making by hand" is the use of tools and labor to make things for use or sale  Examples of service may include retail, insurance, and government. These economists contend that an economy begins to decline as its wealth producing sector shrinks.  Manufacturing is an important activity to promote economic growth and development. Nations which export manufactured products tend to generate higher marginal GDP growth which supports higher incomes and marginal tax revenue needed to fund the quality of life initiatives such as health care and infrastructure in the economy. In Economics, an export is any good or Commodity, Transported from one country to another country in a Legitimate fashion Health care is the prevention treatment and management of illness and the preservation of mental health through the services offered by the medical, Nursing Infrastructure typically refers to the technical structures that support a society such as Roads Water supply, Wastewater, Power grids The field is an important source for engineering job opportunities. Engineering is the Discipline and Profession of applying technical and scientific Knowledge and Among developed countries, it is an important source of good paying jobs for the middle-class to facilitate greater social mobility for successive generations in an economy. The term developed country, or advanced country, is used to categorize countries with developed Economies in which the tertiary and quaternary sectors The middle class, in colloquial usage consists of those who have some economic independence but not a great deal of social Influence or power. See also Economic mobility Social mobility is the degree to which in a given society an individual's family's or group's social status . . . .
Divisions of this sector include: