Abstract: A system including a computerized shopping cart that includes a closed mechanical cart (1) which interconnects/disconnects to units for the insertion/storage of products upon manual command managed by a shopping computer aimed at managing shopping problems and controlling all electronic functions, i.e. automatic system for optically scanning (7) bar codes (UPC/EAN standard), one for checking (8) the correctness of the customer's operations, one emitting the intelligent multimedia commercial message, one for the wireless exchange of data with the outside, for use in supermarkets. The system provides shopping info (8) (list of products on sale, location, price, other), or of the product being purchased (price, whether it is on sale, partial groceries bill), or already purchased (list of purchased items) or to be purchased (remaining shopping list), guided by appropriate interactive messages (acoustic, visual.