The QB Tag Print app allows QuickBooks users (both the desktop or online edition) to print bar codes from their tablet utilizing purchase orders and item list data from QuickBooks. This software can be used in conjunction with any POS system. It requires a ZPCL (Zebra) compatible Label Printer such as Citizen CL-S521-E printer, Brother, Bioxolon, Zebra. For details, see http://tabletposcentral.com/qbtagprint