I'm about to leave, so I can't give a summary of all the chapters. Get some notes off this site if you're worried.
Also, I believe you
do need to know all of the case studies. In the Excel textbook, it states that we "can be tested in the HSC examination. For each [case study], students should be able to identify the type of information system, purpose, processes, information technology (hardware and software), data/information and the participants."
Good luck!
