Obligating funds increases the expended amount and decreases the available balance. A purchase order and an ASR for Central Engineering are examples of obligations. Deobligations are transactions that release funds previously committed for a particular purpose. Deobligating funds decreases the expended amount and increases the available balance. Disbursements are cash payments or expense distributions that reflect actual costs incurred against a fund.
Liquidations are reductions in obligations that result from partial or complete disbursements.
Expended amounts are costs that have already been disbursed or committed in a fund. The expended amount is the total of disbursements to date and current unliquidated obligations. Object Classes are categories of expenses or income where each transaction is recorded. A full list is available here .