OK... as above!
I've learnt, shorter - mark scheme answer - since we're running out of time before the exam, they might be easier for you to learn? They're not great grammatically, but they'll get me full marks - because of the daft marking criteria AQA seem to follow!
A data processing system is operational or low-level automatic data entry used for repetitive/ routine business activities. E.g. point-of-sale
An Information System is a system that takes data from different sources and converts it into information. E.g. Management Information System (MIS).