Australia Post has a non-personalised database of 8.8 million addresses in Australia. It is called the ‘postal address file’ or PAF. The PAF addresses have been assigned a random and unique eight digit number called a ‘Delivery Point Identifier’ or DPID. The DPID is converted to a barcode which is applied above the mailing address on the piece of mail. This lets the mail be electronically processed and sorted by Australia Post for the postman’s delivery route.