Historical introduction to commercial law. The notion of an entrepreneur. The articulations of the enterprise case: the commercial entrepreneur, the agricultural entrepreneur, the small entrepreneur, the collective enterprise and the public enterprise. The acquisition of the status of entrepreneur. The status of the commercial entrepreneur. The company. Distinctive signs. Intellectual works and inventions. Competition. The concept of company. The simple society. The general partnership. The limited partnership. The joint-stock company. The limited partnership. The limited liability company. Co-operative societies. Extraordinary transactions. European societies.