Abstract: This invention is related to a point of sales system that integrates a fuel dispensing controller with POS terminals. The primary purpose of this invention is to provide a POS system which can continue to operate despite a malfunction in the hardware or software associated with the in-store controller. The POS system of the present invention comprises an in-store controller, at least one POS terminal connected to said in-store controller, a fuel dispenser controller connected to at least one fuel dispenser, a switching device connecting said fuel dispenser controller to either said in-store controller or said POS terminal, and control programs for controlling said fuel dispenser controller, and the in-store controller and the POS terminal have the control program respectively.