Сonclusion

So as we can see, big corporations are one of the most important elements of world economy and international economic relations. In the world practice we can face with different types TNCs: corporations, business alliances, chaebols, concerns, holding companies. A corporation is a company or group of people authorized to act as a single entity and recognized as such in law. The Ford Motor Corporation  and BMW Corporation are the best known of them.

A business alliance is an agreement between businesses, usually motivated by cost reduction and improved service for the customer. One of the largest alliances is The Auto Alliance. The Auto Alliance is a trade group of automobile manufacturers that operate in the United States. It includes such companies as General Motors, BMW and Mazda.

A chaebol is a South Korean form of business conglomerate. Samsung  is a South Korean multinational conglomerate headquartered in Samsung Town, Seoul.   Samsung has a powerful influence on South Korea's economic development, politics, media and culture and has been a major driving force behind the "Miracle on the Han River". Its affiliate companies produce around a fifth of South Korea's total exports. Samsung's revenue was equal to 17% of South Korea's $1,082 billion GDP.

A concern is a type of business group common in Europe, particularly in Germany. The best known concern is Henkel AG & Company, KGaA, ( Düsseldorf, Germany). It is a multinational company, founded in 1876. In the fiscal year 2016, Henkel reported sales of 18.1 billion euros and an operating profit of 2.9 billion euros. More than 80 percent of its about 50,000 employees work outside of Germany.

A holding company is a company that owns other companies outstanding stock. The Nestlé S.A. holding is a Swiss that has 447 factories, operates in 194 countries, and employs around 339,000 people.

There are some concerns and holdings In The Republic of Belarus too.

Belneftekhim manufactures over 500 kinds of petrochemical and chemical products. Belneftekhim's enterprises perform a full cycle of works related to crude oil exploration and production, its transportation, refining and oil product sales. Belgospishcheprom is the Belarusian state food industry concern incorporating 57 food producers. It implements a coherent economic, technological and technical policy in the food industry. The Belarusian Production and Trade Concern of timber, woodworking and pulp and paper industry "Bellesbumprom" combines the largest state and other legal entities, producing a wide range of timber products. It is a nonprofit organization and is subordinate to the Council of Ministers. The concern "Bellesbumprom" includes 47 enterprises of different forms of ownership, which together are the largest consumer of timber prepared in the country. Holding “Marko” Company” is the leader of footwear production in the Republic of Belarus. The company has the highest technological process of production, using the modern equipment and new technologies, a wide range of assortment in footwear collections

In conclusion we should say that big companies play a great role in forming of modern economy. Big companies produce vast amounts of goods and services, and are also a source of innovation and technological progress. They also create large number of jobs thereby allowing qualified professionals to realize their potential. They have influence with the whole world, the politics of countries and each person individually.