Yes, Apple's iTunes store system of record runs on a custom SAP ABAP based system. It used to run SAP ERP but that could not take the load of transactions. As

Yes, Apple's iTunes store system of record runs on a custom SAP ABAP based system. It used to run SAP ERP but that could not take the load of transactions. As I understand it, this is the reason why you get a weekly bill from Apple: the iTunes ABAP system makes financial postings to ERP, to reduce the overall number of transactions - and presumably also their credit card overhead.