EN
Business taking place on the Internet cannot work today basing only on price competition. The easy of comparing the offers and changing shops makes clients buy a product once without making further shopping. Furthermore gaining a new customer costs 10 times more than selling a product to an existing one. That is why companies wanting to achieve success on the market introduce strategies and customer management systems. Systems based on knowledge management seem to be the best for e-companies. This article shows the basic elements of customer and knowledge management systems and possibility o f their use on the Internet.