Microsoft does something cool:

"The company is building new file organization software that will begin to form the underpinnings of the next major version of its Windows operating system. The complex data software is meant to address a conundrum as old as the computer industry itself: how to quickly find and work with a piece of information, no matter what its format, from any location.
For those using Windows, this will mean easier, faster and more reliable searches for information. Replacing its antiquated file system with modern database technology should also mean a more reliable Windows that's less likely to break and easier to fix when it does, said analysts and software developers familiar with the company's plans. "