Oh, as far as Windows goes, you can get the basic Office Suite on the iPad: Word, Excel, PPT. You can run it with most features enabled for free, with a free Office 365 account, on 9.7" and smaller iOS devices. You have to pay for the account to use it on the larger 12.9" iPad Pro, and/or get all the features on the smaller devices. Also available are OneDrive and OneNote. If you are using Office 365 on a computer, it's fairly easy to keep your iPad synced. I don't use OneNote, but I occationally use of the Office apps (with a paid account). They are not quite the powerhouses they are on a desktop, but all the key features, capabilities, and compatibilies are there.