Hi... I was just thinking about this and wanted your inputs on the same. I have a Surface RT which as you all know comes with Office RT (which will soon have Outlook RT added to it with 8.1). On my desktop machine, I have Office 2010. If I bought into the Office 365 deal (I would get a very good price because of work-related reasons), it would mean that I could install it and use it on 5 machines (or something like that). At the moment I have only 2 working machines - the RT and the desktop. In a month or so, I will have a Windows phone (probably the Nokia 720). So, once I get O365, I could install it on my desktop machine. I assume I can also install it on the Surface RT and the phone (when I get it)? But the Surface already has Office 2013 RT. What happens to that installation? Does it just lie around occupying my already meager disk space on the RT or does it somehow work with O365? I am quite eager to get O365 (mostly because of the Skydrive space that comes with it) and because of Outlook. The last, of course, is now a non-issue given that a release of Outlook RT is in the offing. So, how does this work? Thanks in advance.