Electronic commerce(EC) one of form. The trader outside it cooperated with enterprise and enterprise, the employee of that enterpriseis the electronic commerce which is done. Transaction between enterprisecalls the transactionof B to B and the generalconsumer Cto C.

The employee sale system to which being cheaper than marketprice,offers the goods and service in for the employee as a part of welfare of enterprise, making use of Intranet and the like is B to E. In case of the respective company product and service there is, a commodity which it handles, but making a contract with the trader outside, there is also a form where enterprise bears the portion of purchase price. By the fact that enterprise becomes the window, lumping together office work job, doing, because lowers management cost, can reduce delivery cost, at discount price offer becomes possible.