Accounts payable has got noting to do with purchase of goods and services, it's work is to pay the eligable invoices.
End to End Process of AP - Process the vendor invoices into system - Work and resolve the discripencies of the invoices (if any) - Make the payments to the invoices as per the agreement - Resolve the issues ( if any ) regarding the invoice payments
There is no specific abbreviation for the term WIRE because when the payment is being made using this option, you will not see the physical movement of funds. It is all electronic. It is just like a current passes through Wire.
Therefore Electronic movement of funds is campared with WIRE.