The professions of the trade include not only the exchanges between "tradesmen and consumers" (retail trade) but also between companies. (inter-corporate sales of goods and services). This is one of the basic tasks of a company: to create its own clientele, to enlarge it... Setting up a "commercial force" in the company must lead to that result. This commercial force unites expertise and some very different professional profiles, which are a result of personal skills, but also the follow-up of programs of study preparing for the exercise of business professions. It is necessary to underline the importance of internships and practical training. Considerable demand, permanent job offering. Recently, a new kind of trade has been developing: the electronic trade, an advanced mode of remote selling.