IE Blog
The user experience is really important to us, so we decided to come up with a way of solving this problem and making Accelerators easier and more useful. The solution we arrived at was the category system.
We haven’t previously explained Accelerator categories, so I thought I’d give a brief amount of background, explain how they work, and show how they can make browsing with Internet Explorer 8 more useful and fun.
http://blogs.msdn.com/ie/archive/2009/04/29/accelerator-categories.aspx
