These systems enable the electronic storage, retrieval, management, delivery and authorisation of business documents such as invoices, purchase orders and statements.
en.wikipedia.org This means invoices, purchase orders, delivery notes, and even payment confirmations.
idm.net.au A sales order, being an internal document, can therefore contain many customer purchase orders under it.
en.wikipedia.org When the game appeared with improper collation, the purchase orders, which exceeded over two million dollars, were cancelled.
en.wikipedia.org In housing, more clearance areas and compulsory purchase orders were introduced, and new sites were found for building.
en.wikipedia.org