There are three types of companies according to their economic activity..:
Primary sector companies. Agriculture, livestock, fishing, and mining. ...
Secondary sector companies (industrial). Companies engaged in industry and construction, i.e., the transformation of goods.
Companies in the tertiary sector (service sector).
What is the purpose of classifying companies by type of activity? Is it important for an entrepreneur to know where he/she is in the classification? Are the regulatory rules the same for each case?