POS software is well known in retail sector and also equally more useful for restaurant stores. These sectors differ in ways where the basics of replenishing stock, receiving payment and issuing receipts remain constant. POS software is used in multiple locations. The barcodes in system feeds back information to stock systems to keep stock levels and records up to date. The software is able to identify which member of staff is accessing the system and allow the staff member to update any of the customer files allocated to that staff member.