The International Standard Industrial Classification of All Economic Activities, abbreviated as ISIC, is an international standard for classifying data according to kind of economic activity in the fields of production, employment, gross domestic product and other statistical areas. This type of classification refers to the main activity of the establishment in which a person worked during the reference period, or last worked if unemployed. The branch of economic activity of a person does not depend on the specific duties or functions of the person’s job, but on the characteristics of the economic unit in which this person works.

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