b if the barcode is not recognized as an item desired personal digital device 14 compares the location of the previous label 18 with that of the current label 18 location step 550 in step 560 personal digital device 14 determines if the shopper is moving in the correct direction if the shopper is not moving in the correct direction the correct direction is calculated step 570 and the correct direction is indicated to the shopper in step 590 if the shopper is moving in the correct direction that direction is set in step 580 and is indicated to the shopper in step 590 this process is continued until the shopper locates the first item listed fig5 b is a flowchart of a method of navigation system 10 of the present invention described in relation to fig1 through 5a fig5 b is an illustration of the found product process of system 10 once the barcode transmitted from a label 18 matches an item listed an indication is given to the shopper that the item is located step 600 in step 610 personal digital device 14 inquires if the shopper responds to the found item if the shopper does not respond to personal digital device 14 the barcode is again checked against the item listed step 620 if the barcode matches the listed item the process resets to step 600 this loop continues for.