Hi all, I bought the iPad simply for the battery life for using the internet as I have no permanent power at home but I would like to try and use it for studies also, I have no idea if there is an app that can do what I want but I hope someone can point me something out. I would like to be able to keep all my class notes (PDF, powerpoint etc) and video recordings of lectures taken with the iPad in one place organised by subject. If I could annotate the PDF's also that would be amazing but it is not essential. If anyone knows of anything suitable please tell! I don't mind paying for it at all.