When studying the different legal disciplines is also desirable to explore areas of law that covers up or which order to understand the importance of the branch of law or field of study mentioned. It is in this vein that we will study the branches of business law to take a comprehensive approach to this branch of law, which from a certain approach is not a field of law but an area of law. The branches and areas that are part of corporate law are: civil law heritage, commercial, corporate, or cartular exchange, securities, bankruptcy formerly known as bankruptcy law, labor, tax, registration, notarial, criminal enterprise, economic constitution, bank, cooperative, civil procedure, customs, industrial, insurance, industrial property (patents, trademarks, etc.) and competition law, trademark, social security, contractual, mining, commercial arbitration and negotiation, business contracts modern, warrants, the supervisory bodies (levy), economic regulation and industrial organization, transport infrastructure, electronic commerce, transport law, corporate responsibility, telecommunications, sanitation, electricity sector economy, oil and electricity, private international law and regulation of the electricity sector.

These are also areas of the law of corporate law, commercial law and some. That is, note that these areas of law covering  almost every right, in this sense can not deny its importance and involving substantial part of it. Corporate law is not the same as the corporate law, but cover the same areas of law in this regard when considering studying business law corporate law. One of the characteristics of corporate law is that it covers quite a few areas of law, which also occurs in the case of corporate law, but not in the case of commercial law, since the latter covers a few areas of law that are corporate, cartular or exchange, securities, bankruptcy, telecommunications, defense of competition, banking, insurance and reinsurance, trademark, among others. In this sense we can say that commercial law is more narrow than the corporate law and corporate law. And the first part of the latter. Only by studying the branches of business law can understand the true importance.

Before developing the business law suitable for our purposes to define the company, thus providing strength in our discussion, an institution that is certainly under-treated by the writers. That is, the company is poorly studied and little has been written about her by the writers, why should devote ourselves to developing it. In the subject field of study is important to note the company, which is considered by the corporate law, business law or business law and corporate law.

The company is the union of labor, management and capital dedicated to meeting a need in the market. This is not the only definition of business, but there are many others which can be used to study the company in full, in that regard, we recommend a more thorough study of this subject that matters to business law.

The different definitions of firm definitions are classified in law, economics, accounting and administration. Therefore before taking into account a definition is important to determine the type of definition in order to have a more complete approach of the company is a market trader. The market brings together the supply and demand.

The business law is the branch of law regulating the business of companies, one of its main branches commercial law. The commercial law is the branch of law that regulates and examines the business of business. Why we must place on record that when defining these two branches of law are similar enough, which is necessary to clarify that the definition can not find the difference but when studying the branches which includes the right business and any case, first by commercial law and then just see the right business.