The Purchasing System Menu provides the method to set up charges against budgets based on purchase orders issued to suppliers. As the PO's are established, account numbers are provided for charges to be made for the goods ordered. Once established, these account numbers will be used during invoice entry for the distribution of the invoices which result from the goods delivered on PO's. The modules which form part of purchase order control include all the facilities necessary to manage the purchase order accounting function, including the budget control aspects of this operation.