One of the biggest changes in Microsoft Office 2013 is the way that it will be sold, it will no longer be sold as a disk but as a “streamed subscription service”. This subscription will be linked to the Office 365 platform allowing consumers to access information/Data fluently through multiple devices.
Angel Revell
http://tech-analyser.blogspot.com/2012/07/office-2013-microsofts-latest-addition.html