Purchase orders are legally binding documents between buyers and suppliers.
Invoice approval software is used to automate the processes involved in approving invoices for payment.
An online purchase order is an electronic version of a paper based purchase order.
A PO system is used to automate the processes involved in the generation of purchase orders.
An electronic purchase order system automates the processes involved in the raising of purchase orders.
An automated purchase order system is used to generate purchase orders in electronic format.