Open POS Menu reload automatic 100 Main PoS Module Point of Sale has been installed Encode sale orders, register payments, compute money to return, create invoices, and manage refunds of former sales through a specific, web-based, touch-screen user interface. If you install the PoS proxy, you will be able to interface OpenERP with retail materials; barcode scanners, printers, cash registers, weighing machine, credit card payments.