The ability to have multiple files open at one time, with different programs running at each file in real-time. This can be useful when working collaboratively or if there are many documents being worked on. It also helps my students learn how to work efficiently online (and not get distracted by other things going around them). They're still tweaking some of the features but it's getting better everyday! I'm looking forward to using this product as we continue through our Professional Development courses together. We've been able to use Word Documents from all over the web without needing any downloading/editing software like Microsoft Office products. Also, since they aren't installed locally, you don't need to worry about saving your computer data space as well.