Code39 is an alpha-numeric barcode that is widely used in the industry, marketing and even by governments. It allows you to encode all the uppercase (from A to Z), digits (from 0 to 9) and a number of other symbols ("-",".", "$","/","+", "%", and space). There is also one special symbol - the asterisk ("*") - which is used to designate the beginning and the end of the code for the barcode scanner. Before and after every Code39 there should be a quiet zone of 10 narrow bars.