The book starts from the conviction according to which English has a growing importance as an instrument of communication, and it is a fact which no longer needs argumentation. This statement is mainly valid for the business students, as teaching English facilitates, on one hand, their chances to get better jobs, such as in multinationals, and on the other hand the possibility to be connected to the latest literature of business. This would not be possible without a thorough knowledge of English, especially for the students who will work in banking, or IT, as there is a so-called professional language, or socio-professional, which has a specific terminology for each area, and which is only comprehensible to the specialists in the field. Whatever the language of communication, in specialised areas, the original English word is used. The arguments in the book support this project, the necessity of English in today's world, as its aim is improving the teaching of English for business students,leading to fluent communication in this language.