They are those companies in charge of the transformation of the raw material obtained in the primary sector, turning it into finished products, which will then be distributed in the different establishments (tertiary sector) to be sold to the consumer and thus satisfy their needs,
There are also companies belonging to this sector that are in charge of manufacturing semi-finished products that are going to be used to obtain a final product, such is the case of automobile parts factories, they manufacture the necessary parts for the assembly of vehicles and later they are sent to the assembly companies.
In history, these companies started in the eighteenth century but it was not until the middle of that century with the appearance of the industrial revolution that they had a boom thanks to industrial capitalism and the mechanization of industry, using energy sources such as, the steam and coal, then with the arrival of the second industrial revolution new sources of energy is used as electricity, which allowed the mechanization of industry finally in the decade of the seventies with the emergence of computer companies the secondary sector have reached unexpected levels, being able to bring to the market more quality products and quality services.
Among the main companies belonging to this sector, we can mention the metallurgical company, which is in charge of the production of metallic products from those obtained by the mining industry (iron, copper, aluminum, etc.) then these products are taken to the companies of Capital goods, which are in charge of producing a final product from the products of the metallurgical industry. The food industry is one of the companies in the secondary sector with significant relevance, since it is in charge of processing, packaging and preserving both products of animal originlike those of vegetable origin. Textile companies also fall into this category, since they use raw materials of animal origin (silk) and synthetic origin (plastic) for the manufacture of clothing.
Over time, companies belonging to the secondary sector have undergone a large number of modifications, this is mainly due to the appearance of new technologies, in addition to the appearance of new materials (metallic alloys) and the use of recycled raw material, which benefits greatly to the preservation of the environment and its resources.
