On the Windows 8 Metro-style Start page, you can sort individual app tiles into groups and rename them -- but the function isn't particularly obvious. Here's how to do it.
Tech blogger Helen Bradley runs through the process of creating and renaming groups. It isn't particularly obvious you have this option because it only appears when you use the Zoom option on the Start screen to shrink tiles. Hit the post for full instructions.
Making Groups in Windows 8 [Project Woman]