The Accounts Payable System allows you to process your Purchase Order Requisitions, Purchase Orders, Invoices, and Checks and has an area to indicate merchandise was received. The SDS system contains a complete encumbrance system that updates the main budget at the time of creating a requisition. Once an invoice is entered, the system will automatically relieve the encumbrance and budget balance for each account affected. Purchase orders may be maintained for the current year budget or next year’s budget. Invoices can be charged to the current month or next month(s). The next month(s) area allows information to be processed efficiently and in a timely manner.